2.2.181 Problems 18001 to 18100

Table 2.363: Main lookup table. Sorted sequentially by problem number.

#

ODE

CAS classification

Solved?

time (sec)

18001

\[ {}y^{\prime \prime }+10 y^{\prime }+25 y = 14 \,{\mathrm e}^{-5 x} \]

[[_2nd_order, _with_linear_symmetries]]

0.857

18002

\[ {}y^{\prime \prime }-2 y^{\prime }+5 y = 25 x^{2}+12 \]

[[_2nd_order, _with_linear_symmetries]]

20.746

18003

\[ {}y^{\prime \prime }-y^{\prime }-6 y = 20 \,{\mathrm e}^{-2 x} \]

[[_2nd_order, _with_linear_symmetries]]

0.964

18004

\[ {}y^{\prime \prime }-3 y^{\prime }+2 y = 14 \sin \left (2 x \right )-18 \cos \left (2 x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.286

18005

\[ {}y^{\prime \prime }+y = 2 \cos \left (x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

3.026

18006

\[ {}y^{\prime \prime }-2 y^{\prime } = 12 x -10 \]

[[_2nd_order, _missing_y]]

1.737

18007

\[ {}y^{\prime \prime }-2 y^{\prime }+y = 6 \,{\mathrm e}^{x} \]

[[_2nd_order, _with_linear_symmetries]]

0.820

18008

\[ {}y^{\prime \prime }-2 y^{\prime }+2 y = {\mathrm e}^{x} \sin \left (x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

5.622

18009

\[ {}y^{\prime \prime }+y^{\prime } = 10 x^{4}+2 \]

[[_2nd_order, _missing_y]]

1.762

18010

\[ {}y^{\prime \prime }+k^{2} y = \sin \left (b x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.303

18011

\[ {}y^{\prime \prime }+4 y = 4 \cos \left (2 x \right )+6 \cos \left (x \right )+8 x^{2}-4 x \]

[[_2nd_order, _linear, _nonhomogeneous]]

5.973

18012

\[ {}y^{\prime \prime }+9 y = 2 \sin \left (3 x \right )+4 \sin \left (x \right )-26 \,{\mathrm e}^{-2 x}+27 x^{3} \]

[[_2nd_order, _linear, _nonhomogeneous]]

9.221

18013

\[ {}y^{\prime \prime }-2 y^{\prime }+y = 2 x \]

[[_2nd_order, _with_linear_symmetries]]

0.878

18014

\[ {}y^{\prime \prime }-y^{\prime }-6 y = {\mathrm e}^{-x} \]

[[_2nd_order, _with_linear_symmetries]]

0.884

18015

\[ {}y^{\prime \prime }+4 y = \tan \left (2 x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

7.139

18016

\[ {}y^{\prime \prime }+2 y^{\prime }+y = {\mathrm e}^{-x} \ln \left (x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.349

18017

\[ {}y^{\prime \prime }-2 y^{\prime }-3 y = 64 x \,{\mathrm e}^{-x} \]

[[_2nd_order, _linear, _nonhomogeneous]]

0.970

18018

\[ {}y^{\prime \prime }+2 y^{\prime }+5 y = {\mathrm e}^{-x} \sec \left (2 x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

16.753

18019

\[ {}2 y^{\prime \prime }+3 y^{\prime }+y = {\mathrm e}^{-3 x} \]

[[_2nd_order, _with_linear_symmetries]]

1.246

18020

\[ {}y^{\prime \prime }-3 y^{\prime }+2 y = \frac {1}{1+{\mathrm e}^{-x}} \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.053

18021

\[ {}y^{\prime \prime }+y = \sec \left (x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

2.922

18022

\[ {}y^{\prime \prime }+y = \cot \left (x \right )^{2} \]

[[_2nd_order, _linear, _nonhomogeneous]]

2.683

18023

\[ {}y^{\prime \prime }+y = \cot \left (2 x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

5.141

18024

\[ {}y^{\prime \prime }+y = x \cos \left (x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

3.526

18025

\[ {}y^{\prime \prime }+y = \tan \left (x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

3.029

18026

\[ {}y^{\prime \prime }+y = \sec \left (x \right ) \tan \left (x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

2.520

18027

\[ {}y^{\prime \prime }+y = \sec \left (x \right ) \csc \left (x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

3.283

18028

\[ {}\left (x^{2}-1\right ) y^{\prime \prime }-2 x y^{\prime }+2 y = \left (x^{2}-1\right )^{2} \]

[[_2nd_order, _with_linear_symmetries]]

1.859

18029

\[ {}\left (x^{2}+x \right ) y^{\prime \prime }+\left (-x^{2}+2\right ) y^{\prime }-\left (x +2\right ) y = x \left (x +1\right )^{2} \]

[[_2nd_order, _linear, _nonhomogeneous]]

2.041

18030

\[ {}\left (1-x \right ) y^{\prime \prime }+x y^{\prime }-y = \left (1-x \right )^{2} \]

[[_2nd_order, _with_linear_symmetries]]

2.284

18031

\[ {}x y^{\prime \prime }-\left (x +1\right ) y^{\prime }+y = x^{2} {\mathrm e}^{2 x} \]

[[_2nd_order, _with_linear_symmetries]]

1.580

18032

\[ {}x^{2} y^{\prime \prime }-2 x y^{\prime }+2 y = x \,{\mathrm e}^{-x} \]

[[_2nd_order, _with_linear_symmetries]]

3.706

18033

\[ {}y^{\prime \prime \prime }-3 y^{\prime \prime }+2 y^{\prime } = 0 \]

[[_3rd_order, _missing_x]]

0.052

18034

\[ {}y^{\prime \prime \prime }-3 y^{\prime \prime }+4 y^{\prime }-2 y = 0 \]

[[_3rd_order, _missing_x]]

0.062

18035

\[ {}y^{\prime \prime \prime }-y = 0 \]

[[_3rd_order, _missing_x]]

0.062

18036

\[ {}y^{\prime \prime \prime }+y = 0 \]

[[_3rd_order, _missing_x]]

0.059

18037

\[ {}y^{\prime \prime \prime }+3 y^{\prime \prime }+3 y^{\prime }+y = 0 \]

[[_3rd_order, _missing_x]]

0.055

18038

\[ {}y^{\prime \prime \prime \prime }+4 y^{\prime \prime \prime }+6 y^{\prime \prime }+4 y^{\prime }+y = 0 \]

[[_high_order, _missing_x]]

0.056

18039

\[ {}y^{\prime \prime \prime \prime }-y = 0 \]

[[_high_order, _missing_x]]

0.058

18040

\[ {}y^{\prime \prime \prime \prime }+5 y^{\prime \prime }+4 y = 0 \]

[[_high_order, _missing_x]]

0.065

18041

\[ {}y^{\prime \prime \prime \prime }+2 a^{2} y^{\prime \prime }+a^{4} y = 0 \]

[[_high_order, _missing_x]]

0.078

18042

\[ {}y^{\prime \prime \prime \prime }+2 a^{2} y^{\prime \prime }+a^{4} y = 0 \]

[[_high_order, _missing_x]]

0.414

18043

\[ {}y^{\prime \prime \prime \prime }+2 y^{\prime \prime \prime }+2 y^{\prime \prime }+2 y^{\prime }+y = 0 \]

[[_high_order, _missing_x]]

0.073

18044

\[ {}y^{\prime \prime \prime \prime }+2 y^{\prime \prime \prime }-2 y^{\prime \prime }-6 y^{\prime }+5 y = 0 \]

[[_high_order, _missing_x]]

0.078

18045

\[ {}y^{\prime \prime \prime }-6 y^{\prime \prime }+11 y^{\prime }-6 y = 0 \]

[[_3rd_order, _missing_x]]

0.053

18046

\[ {}y^{\prime \prime \prime \prime }+y^{\prime \prime \prime }-3 y^{\prime \prime }-5 y^{\prime }-2 y = 0 \]

[[_high_order, _missing_x]]

0.062

18047

\[ {}y^{\left (5\right )}-6 y^{\prime \prime \prime \prime }-8 y^{\prime \prime \prime }+48 y^{\prime \prime }+16 y^{\prime }-96 y = 0 \]

[[_high_order, _missing_x]]

0.118

18048

\[ {}y^{\prime \prime \prime \prime } = 0 \]

[[_high_order, _quadrature]]

0.059

18049

\[ {}y^{\prime \prime \prime \prime } = \sin \left (x \right )+24 \]

[[_high_order, _quadrature]]

0.148

18050

\[ {}y^{\prime \prime \prime }-3 y^{\prime \prime }+2 y^{\prime } = 10+42 \,{\mathrm e}^{3 x} \]

[[_3rd_order, _missing_y]]

0.123

18051

\[ {}y^{\prime \prime \prime }-y^{\prime } = 1 \]
i.c.

[[_3rd_order, _missing_x]]

0.145

18052

\[ {}x^{3} y^{\prime \prime \prime }+3 x^{2} y^{\prime \prime } = 0 \]

[[_3rd_order, _missing_y]]

0.193

18053

\[ {}x^{3} y^{\prime \prime \prime }+x^{2} y^{\prime \prime }-2 x y^{\prime }+2 y = 0 \]

[[_3rd_order, _exact, _linear, _homogeneous]]

0.115

18054

\[ {}x^{3} y^{\prime \prime \prime }+2 x^{2} y^{\prime \prime }+x y^{\prime }-y = 0 \]

[[_3rd_order, _with_linear_symmetries]]

0.130

18055

\[ {}x^{3} y^{\prime \prime \prime \prime }+8 x^{2} y^{\prime \prime \prime }+8 x y^{\prime \prime }-8 y^{\prime } = 0 \]

[[_high_order, _missing_y]]

0.269

18056

\[ {}y^{\prime \prime }-4 y = {\mathrm e}^{2 x} \]

[[_2nd_order, _with_linear_symmetries]]

1.138

18057

\[ {}y^{\prime \prime }-y = x^{2} {\mathrm e}^{2 x} \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.385

18058

\[ {}y^{\prime \prime }+4 y^{\prime }+4 y = 10 x^{3} {\mathrm e}^{-2 x} \]

[[_2nd_order, _linear, _nonhomogeneous]]

0.733

18059

\[ {}y^{\prime \prime }-2 y^{\prime }+y = {\mathrm e}^{x} \]

[[_2nd_order, _with_linear_symmetries]]

0.722

18060

\[ {}y^{\prime \prime }-y = {\mathrm e}^{-x} \]

[[_2nd_order, _with_linear_symmetries]]

0.619

18061

\[ {}y^{\prime \prime }-2 y^{\prime }-3 y = 6 \,{\mathrm e}^{5 x} \]

[[_2nd_order, _with_linear_symmetries]]

0.670

18062

\[ {}y^{\prime \prime }-y^{\prime }+y = x^{3}-3 x^{2}+1 \]

[[_2nd_order, _linear, _nonhomogeneous]]

30.876

18063

\[ {}y^{\prime \prime \prime }-2 y^{\prime }+y = 2 x^{3}-3 x^{2}+4 x +5 \]

[[_3rd_order, _linear, _nonhomogeneous]]

0.330

18064

\[ {}4 y^{\prime \prime }+y = x^{4} \]

[[_2nd_order, _linear, _nonhomogeneous]]

2.822

18065

\[ {}y^{\left (5\right )}-y^{\prime \prime \prime } = x^{2} \]

[[_high_order, _missing_y]]

0.127

18066

\[ {}y^{\left (6\right )}-y = x^{10} \]

[[_high_order, _linear, _nonhomogeneous]]

0.350

18067

\[ {}y^{\prime \prime }+y^{\prime }-y = -x^{4}+3 x \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.307

18068

\[ {}y^{\prime \prime }+y = x^{4} \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.234

18069

\[ {}y^{\prime \prime \prime }-y^{\prime \prime } = 12 x -2 \]

[[_3rd_order, _missing_y]]

0.098

18070

\[ {}y^{\prime \prime \prime }+y^{\prime \prime } = 9 x^{2}-2 x +1 \]

[[_3rd_order, _missing_y]]

0.129

18071

\[ {}y^{\prime \prime }-4 y^{\prime }+3 y = x^{3} {\mathrm e}^{2 x} \]

[[_2nd_order, _linear, _nonhomogeneous]]

0.851

18072

\[ {}y^{\prime \prime }-7 y^{\prime }+12 y = {\mathrm e}^{2 x} \left (x^{3}-5 x^{2}\right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

0.963

18073

\[ {}y^{\prime \prime }+2 y^{\prime }+y = 2 x^{2} {\mathrm e}^{-2 x}+3 \,{\mathrm e}^{2 x} \]

[[_2nd_order, _linear, _nonhomogeneous]]

0.941

18074

\[ {}y^{\prime \prime \prime }-8 y = 16 x^{2} \]

[[_3rd_order, _with_linear_symmetries]]

0.116

18075

\[ {}y^{\prime \prime \prime \prime }-y = -x^{3}+1 \]

[[_high_order, _linear, _nonhomogeneous]]

0.119

18076

\[ {}y^{\prime \prime \prime }-\frac {y^{\prime }}{4} = x \]

[[_3rd_order, _missing_y]]

0.098

18077

\[ {}y^{\prime \prime \prime \prime } = \frac {1}{x^{3}} \]

[[_high_order, _quadrature]]

0.217

18078

\[ {}y^{\prime \prime \prime }-y^{\prime \prime }+y^{\prime } = x +1 \]

[[_3rd_order, _missing_y]]

0.125

18079

\[ {}y^{\prime \prime \prime }+2 y^{\prime \prime } = x \]

[[_3rd_order, _missing_y]]

0.112

18080

\[ {}y^{\prime \prime \prime }-6 y^{\prime \prime }+12 y^{\prime }-8 y = {\mathrm e}^{2 x} \]

[[_3rd_order, _with_linear_symmetries]]

0.132

18081

\[ {}y^{\prime \prime \prime }+3 y^{\prime \prime }+3 y^{\prime }+y = 12 \,{\mathrm e}^{-x} \]

[[_3rd_order, _with_linear_symmetries]]

0.130

18082

\[ {}y^{\prime \prime }-4 y^{\prime }+4 y = {\mathrm e}^{2 x} \sin \left (x \right ) \]

[[_2nd_order, _linear, _nonhomogeneous]]

1.010

18083

\[ {}y^{\prime } = 2 x y \]

[_separable]

0.441

18084

\[ {}y^{\prime }+y = 1 \]

[_quadrature]

0.233

18085

\[ {}x y^{\prime } = y \]

[_separable]

0.320

18086

\[ {}x^{2} y^{\prime } = y \]

[_separable]

0.050

18087

\[ {}y^{\prime } = 1+y^{2} \]
i.c.

[_quadrature]

0.142

18088

\[ {}y^{\prime } = x -y \]
i.c.

[[_linear, ‘class A‘]]

0.250

18089

\[ {}\left (x^{2}+1\right ) y^{\prime \prime }+2 x y^{\prime }-2 y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.487

18090

\[ {}y^{\prime \prime }+x y^{\prime }+y = 0 \]

[[_2nd_order, _exact, _linear, _homogeneous]]

1.089

18091

\[ {}y^{\prime \prime }+x y^{\prime }+y = 0 \]

[[_2nd_order, _exact, _linear, _homogeneous]]

0.493

18092

\[ {}y^{\prime \prime }+y^{\prime }-x y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.331

18093

\[ {}y^{\prime \prime }+x y = 0 \]

[[_Emden, _Fowler]]

0.409

18094

\[ {}\left (-x^{2}+1\right ) y^{\prime \prime }-x y^{\prime }+n^{2} y = 0 \]

[_Gegenbauer, [_2nd_order, _linear, ‘_with_symmetry_[0,F(x)]‘]]

0.437

18095

\[ {}y^{\prime \prime }-2 x y^{\prime }+2 n y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.361

18096

\[ {}x^{3} \left (x -1\right ) y^{\prime \prime }-2 \left (x -1\right ) y^{\prime }+3 x y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.115

18097

\[ {}x^{2} \left (x^{2}-1\right )^{2} y^{\prime \prime }-x \left (1-x \right ) y^{\prime }+2 y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.793

18098

\[ {}x^{2} y^{\prime \prime }+\left (2-x \right ) y^{\prime } = 0 \]

[[_2nd_order, _missing_y]]

0.166

18099

\[ {}\left (3 x +1\right ) x y^{\prime \prime }-\left (x +1\right ) y^{\prime }+2 y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

1.905

18100

\[ {}y^{\prime \prime }+\sin \left (x \right ) y = 0 \]

[[_2nd_order, _with_linear_symmetries]]

0.644