2.3.160 Problems 15901 to 16000

Table 2.903: Main lookup table. Sorted by time used to solve.

#

ID

ODE

Solved?

Maple

Mma

Sympy

time(sec)

15901

13414

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=-3 y+4 \cos \left (2 t \right ) \end {array} \]

3.102

15902

8819

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=2 y+\sin \left (2 t \right ) \end {array} \]

3.103

15903

27726

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=3 y-4 \,{\mathrm e}^{3 t} \end {array} \]

3.103

15904

4888

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\frac {y}{2}+4 \,{\mathrm e}^{\frac {t}{2}} \end {array} \]

3.104

15905

27809

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }+2 y&={\mathrm e}^{\frac {t}{3}}\\ y \left (0\right )&=1\\ \end {array} \]

3.104

15906

3779

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} -2 y+y^{\prime }&=3 \,{\mathrm e}^{-2 t}\\ y \left (0\right )&=10\\ \end {array} \]

3.105

15907

7409

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y+y^{\prime }&=\cos \left (2 t \right )\\ y \left (0\right )&=5\\ \end {array} \]

3.106

15908

11397

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} 3 y+y^{\prime }&=\cos \left (2 t \right )\\ y \left (0\right )&=-1\\ \end {array} \]

3.106

15909

19230

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} -2 y+y^{\prime }&=7 \,{\mathrm e}^{2 t}\\ y \left (0\right )&=3\\ \end {array} \]

3.106

15910

5611

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }+2 y&=3 t^{2}+2 t -1 \end {array} \]

3.107

15911

14205

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }+2 y&=t^{2}+2 t +1+{\mathrm e}^{4 t} \end {array} \]

3.107

15912

21100

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y+y^{\prime }&=t^{3}+\sin \left (3 t \right ) \end {array} \]

3.107

15913

160

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }-3 y&=2 t -{\mathrm e}^{4 t} \end {array} \]

3.108

15914

7800

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y+y^{\prime }&=\cos \left (2 t \right )+3 \sin \left (2 t \right )+{\mathrm e}^{-t} \end {array} \]

3.108

15915

7434

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=-\frac {y}{t}+2 \end {array} \]

3.110

15916

2754

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\frac {3 y}{t}+t^{5} \end {array} \]

3.111

15917

22861

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=-\frac {y}{1+t}+t^{2} \end {array} \]

3.111

15918

9904

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=-2 t y+4 \,{\mathrm e}^{-t^{2}} \end {array} \]

3.112

15919

17520

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }-\frac {2 t y}{t^{2}+1}&=3 \end {array} \]

3.112

15920

19991

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }-\frac {2 y}{t}&=t^{3} {\mathrm e}^{t} \end {array} \]

3.113

15921

2392

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=-\frac {y}{1+t}+2\\ y \left (0\right )&=3\\ \end {array} \]

3.114

15922

9962

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\frac {y}{1+t}+4 t^{2}+4 t\\ y \left (1\right )&=10\\ \end {array} \]

3.115

15923

13392

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=-\frac {y}{t}+2\\ y \left (1\right )&=3\\ \end {array} \]

3.115

15924

27829

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=-2 t y+4 \,{\mathrm e}^{-t^{2}}\\ y \left (0\right )&=3\\ \end {array} \]

3.115

15925

786

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }-\frac {2 y}{t}&=2 t^{2}\\ y \left (-2\right )&=4\\ \end {array} \]

3.116

15926

4288

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }-\frac {3 y}{t}&=2 t^{3} {\mathrm e}^{2 t}\\ y \left (1\right )&=0\\ \end {array} \]

3.117

15927

4294

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\sin \left (t \right ) y+4 \end {array} \]

3.117

15928

23302

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=t^{2} y+4 \end {array} \]

3.117

15929

27528

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\frac {y}{t^{2}}+4 \cos \left (t \right ) \end {array} \]

3.118

15930

15123

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=y+4 \cos \left (t^{2}\right ) \end {array} \]

3.119

15931

16419

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=-{\mathrm e}^{-t^{2}} y+\cos \left (t \right ) \end {array} \]

3.120

15932

3591

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\frac {y}{\sqrt {t^{3}-3}}+t \end {array} \]

3.121

15933

24648

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=a t y+4 \,{\mathrm e}^{-t^{2}} \end {array} \]

3.121

15934

23847

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=t^{r} y+4 \end {array} \]

3.122

15935

9863

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} v^{\prime }+\frac {2 v}{5}&=3 \cos \left (2 t \right ) \end {array} \]

3.123

15936

22583

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=-2 t y+4 \,{\mathrm e}^{-t^{2}} \end {array} \]

3.123

15937

9414

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }+2 y&=3 \,{\mathrm e}^{-2 t} \end {array} \]

3.124

15938

26669

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=3 y \end {array} \]

3.124

15939

8445

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=t^{2} \left (t^{2}+1\right ) \end {array} \]

3.125

15940

11354

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=-\sin \left (y\right )^{5} \end {array} \]

3.125

15941

17389

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\frac {\left (t^{2}-4\right ) \left (1+y\right ) {\mathrm e}^{y}}{\left (t -1\right ) \left (3-y\right )} \end {array} \]

3.125

15942

13903

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\sin \left (y\right )^{2} \end {array} \]

3.127

15943

22998

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\left (y-3\right ) \left (\sin \left (y\right ) \sin \left (t \right )+\cos \left (t \right )+1\right )\\ y \left (0\right )&=4\\ \end {array} \]

3.127

15944

2805

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=y+{\mathrm e}^{-t} \end {array} \]

3.128

15945

7342

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=3-2 y \end {array} \]

3.128

15946

19876

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=t y \end {array} \]

3.128

15947

7442

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=3 y+{\mathrm e}^{7 t} \end {array} \]

3.129

15948

18502

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\frac {t y}{t^{2}+1} \end {array} \]

3.129

15949

21327

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=-5 y+\sin \left (3 t \right ) \end {array} \]

3.129

15950

22611

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=t +\frac {2 y}{1+t} \end {array} \]

3.129

15951

5902

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=3+y^{2} \end {array} \]

3.130

15952

12307

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=2 y-y^{2} \end {array} \]

3.130

15953

18034

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=-3 y+{\mathrm e}^{-2 t}+t^{2} \end {array} \]

3.130

15954

19776

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} x^{\prime }&=-t x\\ x \left (0\right )&={\mathrm e}\\ \end {array} \]

3.130

15955

3265

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=2 y+\cos \left (4 t \right )\\ y \left (0\right )&=1\\ \end {array} \]

3.131

15956

8744

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=3 y+2 \,{\mathrm e}^{3 t}\\ y \left (0\right )&=-1\\ \end {array} \]

3.131

15957

9536

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=t^{2} y^{3}+y^{3}\\ y \left (0\right )&=-{\frac {1}{2}}\\ \end {array} \]

3.132

15958

22869

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }+5 y&=3 \,{\mathrm e}^{-5 t}\\ y \left (0\right )&=-2\\ \end {array} \]

3.132

15959

7484

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=2 t y+3 t \,{\mathrm e}^{t^{2}}\\ y \left (0\right )&=1\\ \end {array} \]

3.133

15960

8888

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\frac {\left (1+t \right )^{2}}{\left (1+y\right )^{2}}\\ y \left (0\right )&=0\\ \end {array} \]

3.134

15961

909

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=2 t y^{2}+3 t^{2} y^{2}\\ y \left (1\right )&=-1\\ \end {array} \]

3.135

15962

9640

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=1-y^{2}\\ y \left (0\right )&=1\\ \end {array} \]

3.135

15963

27321

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\frac {t^{2}}{y+t^{3} y}\\ y \left (0\right )&=-2\\ \end {array} \]

3.135

15964

23322

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=y^{2}-2 y+1\\ y \left (0\right )&=2\\ \end {array} \]

3.136

15965

27351

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\left (y-2\right ) \left (y+1-\cos \left (t \right )\right ) \end {array} \]

3.137

15966

878

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\left (y-1\right ) \left (y-2\right ) \left (y-{\mathrm e}^{\frac {t}{2}}\right ) \end {array} \]

3.139

15967

4206

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=t^{2} y+1+y+t^{2} \end {array} \]

3.139

15968

5400

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=\frac {2 y+1}{t} \end {array} \]

3.139

15969

20423

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} y^{\prime }&=3-y^{2}\\ y \left (0\right )&=0\\ \end {array} \]

3.139

15970

1637

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=x \left (t \right )-y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=x \left (t \right )-y \left (t \right )\\ \end {array} \]

3.140

15971

6322

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=2 x \left (t \right )-y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=0\\ \end {array} \]

3.140

15972

9545

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=x \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=2 x \left (t \right )+y \left (t \right )\\ \end {array} \]

3.140

15973

21829

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=2 y \left (t \right )-x \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=2 x \left (t \right )-y \left (t \right )\\ \end {array} \]

3.142

15974

26629

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=2 x \left (t \right )+y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=x \left (t \right )+y \left (t \right )\\ \end {array} \]

3.142

15975

7944

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=3 y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=3 \pi y \left (t \right )-\frac {x \left (t \right )}{3}\\ \end {array} \]

3.143

15976

24375

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}p \left (t \right )&=3 p \left (t \right )-2 q \left (t \right )-7 r \left (t \right )\\ \frac {d}{d t}q \left (t \right )&=-2 p \left (t \right )+6 r \left (t \right )\\ \frac {d}{d t}r \left (t \right )&=\frac {73 q \left (t \right )}{100}+2 r \left (t \right )\\ \end {array} \]

3.144

15977

7161

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=-3 x \left (t \right )+2 \pi y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=4 x \left (t \right )-y \left (t \right )\\ \end {array} \]

3.145

15978

7902

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=\beta y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=\gamma x \left (t \right )-y \left (t \right )\\ \end {array} \]

3.145

15979

11303

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=2 y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=x \left (t \right )+y \left (t \right )\\ \end {array} \]

3.145

15980

17299

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} x^{\prime }\left (t \right )&=x \left (t \right )-y\\ y^{\prime }&=x \left (t \right )+3 y\\ \end {array} \]

3.145

15981

15964

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} x^{\prime }\left (t \right )&=-2 x \left (t \right )-y\\ y^{\prime }&=2 x \left (t \right )-5 y\\ \end {array} \]

3.146

15982

4396

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=-2 x \left (t \right )-3 y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=3 x \left (t \right )-2 y \left (t \right )\\ \end {array} \]

3.147

15983

11462

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=2 x \left (t \right )+3 y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=x \left (t \right )\\ \end {array} \]

3.148

15984

17007

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=1\\ \frac {d}{d t}y \left (t \right )&=x \left (t \right )\\ \end {array} \]

3.148

15985

20809

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} x^{\prime }&=3 x\\ y^{\prime }&=-2 y\\ \end {array} \]

3.148

15986

13293

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=-4 x \left (t \right )-2 y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=-x \left (t \right )-3 y \left (t \right )\\ \end {array} \]

3.149

15987

20909

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=-5 x \left (t \right )-2 y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=-x \left (t \right )-4 y \left (t \right )\\ \end {array} \]

3.149

15988

9905

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=2 x \left (t \right )+y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=-x \left (t \right )+4 y \left (t \right )\\ \end {array} \]

3.150

15989

27443

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=-\frac {x \left (t \right )}{2}\\ \frac {d}{d t}y \left (t \right )&=x \left (t \right )-\frac {y \left (t \right )}{2}\\ \end {array} \]

3.150

15990

9408

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=5 x \left (t \right )+4 y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=9 x \left (t \right )\\ \end {array} \]

3.151

15991

9865

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=3 x \left (t \right )+4 y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=x \left (t \right )\\ \end {array} \]

3.151

15992

16314

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=2 x \left (t \right )-y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=-x \left (t \right )+y \left (t \right )\\ \end {array} \]

3.151

15993

20830

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=2 x \left (t \right )+y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=x \left (t \right )+y \left (t \right )\\ \end {array} \]

3.151

15994

24320

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=-x \left (t \right )-2 y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=x \left (t \right )-4 y \left (t \right )\\ \end {array} \]

3.151

15995

7531

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=-2 x \left (t \right )-2 y \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=-2 x \left (t \right )+y \left (t \right )\\ \end {array} \]

3.152

15996

15227

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} x^{\prime }\left (t \right )&=-2 x \left (t \right )-2 y\\ y^{\prime }&=-2 x \left (t \right )+y\\ \end {array} \]

3.152

15997

27877

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} x^{\prime }&=-2 x-2 y\\ y^{\prime }&=-2 x+y\\ \end {array} \]

3.152

15998

26183

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=3 x \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=x \left (t \right )-2 y \left (t \right )\\ \end {array} \]

3.153

15999

8175

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} \frac {d}{d t}x \left (t \right )&=3 x \left (t \right )\\ \frac {d}{d t}y \left (t \right )&=x \left (t \right )-2 y \left (t \right )\\ \end {array} \]

3.154

16000

14843

\[ \begin {array}{>{\displaystyle }r @{\;} >{\displaystyle }l} x^{\prime }&=3 x\\ y^{\prime }\left (t \right )&=x-2 y \left (t \right )\\ \end {array} \]

3.154