integrate definite integrals matlab

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dav
dav 2013-4-24
Hi
What is wrong with the following code please?
thanks
int((5*x)/((x^3-(7*x))^4), x=-1..1)

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Carlos
Carlos 2013-4-24
编辑：Carlos 2013-4-24
>> syms x
>> int((5*x)/((x^3-(7*x))^4),-1,1)
ans =
NaN
Which is correct if you consider you are working with a non-convergent improper integral

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