Problem 231. Differential equations I

Solution 26440

Submitted on 3 Feb 2012 by S L

This solution is locked. To view this solution, you need to provide a solution of the same size or smaller.

Test	Status	Code Input and Output
1	Pass	%% f = @(x) -x; tf =1; y0 =1; assert(abs(deqnsolve(f,y0,tf)-exp(-1)) < 1e-5)
2	Pass	%% f = @sin; tf =1; y0 =1/2; assert(abs(deqnsolve(f,y0,tf)-2acot(exp(-1)cot(1/4))) < 1e-5)
3	Pass	%% f = @(x) 1/(x+1); tf =6; y0 =1; assert(abs(deqnsolve(f,y0,tf)-3) < 1e-5)
4	Pass	%% a randomized one a = rand0.9; f = @(x) x-ax^2; tf = rand+1.5; y0=1; assert(abs(deqnsolve(f,y0,tf)-exp(tf)/(1-a+a*exp(tf))) < 1e-5)