I know that tu solve this primitive we have tu use the substitution method,but I think that none of the rules that should be used apply to this!The problem is, to use the substitution: x=a/b sen t we should have the function in the format (sqrt(a^2 - b^2*x^2)),but instead of a x^2 I have a x^4.(adsbygoogle = window.adsbygoogle || []).push({});

I'm studying for an exam about primitives I'm having tomorrow and I really could use some help on this!

Thanks in advance for the reply!

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# Primitive of x/sqrt(4+x^4)

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