Solve the integral using FTC. integral sign integral from (1,2) x^3lnx dx I don't know if I should use "u" substitution or integration by parts?
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Originally Posted by ashley09 Solve the integral using FTC. integral sign integral from (1,2) x^3lnx dx I don't know if I should use "u" substitution or integration by parts? Integration by parts: $\displaystyle u = ln(x)$, $\displaystyle dv = x^3$
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