help with finding the definite integral using u substitution. ({sec^2[1/x^37]}/x)dx. U=(1/x^37) And x^3(2 + x^4)^6 dx. U =(2 + x^4).
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Originally Posted by doneng x^3(2 + x^4)^6 dx. U =(2 + x^4). Your first one does not make sense so I do this one. If then and . Thus we will write, This integral is, .
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