Does anybody know much about how this works?(adsbygoogle = window.adsbygoogle || []).push({});

I can't understand why it doesn't give me an answer for definite integrals sometimes... e.g. in Matlab R2011a:

syms x a;

int(x/sqrt(x^2+a^2))

gives the answer (a^2 + x^2)^(1/2) as expected.

But int(x/sqrt(x^2+a^2),0,10) gives - Warning: Explicit integral could not be found.

This doesn't really make any sense as the answer should be (a^2 + 10^2)^(1/2) - a. Is there some way to understand this strange behavior?

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# Matlab Symbolic Math Toolbox

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