Cody

Problem 231. Differential equations I

Solution 2732661

Submitted on 23 Jul 2020
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Test Suite

Test Status Code Input and Output
1   Fail
f = @(x) -x; tf =1; y0 =1; assert(abs(deqnsolve(f,y0,tf)-exp(-1)) < 1e-5)

Error in solution: Line: 7 Column: 8 Invalid use of operator.

2   Fail
f = @sin; tf =1; y0 =1/2; assert(abs(deqnsolve(f,y0,tf)-2*acot(exp(-1)*cot(1/4))) < 1e-5)

Error in solution: Line: 7 Column: 8 Invalid use of operator.

3   Fail
f = @(x) 1/(x+1); tf =6; y0 =1; assert(abs(deqnsolve(f,y0,tf)-3) < 1e-5)

Error in solution: Line: 7 Column: 8 Invalid use of operator.

4   Fail
a = rand*0.9; f = @(x) x-a*x^2; tf = rand+1.5; y0=1; assert(abs(deqnsolve(f,y0,tf)-exp(tf)/(1-a+a*exp(tf))) < 1e-5)

Error in solution: Line: 7 Column: 8 Invalid use of operator.