PutnamChallengeIntegrals I: Feynman's Trick ShareIntegrals I: Feynman's Trick · Challenge problemEvaluate ∫1∞dxx9\displaystyle\int_1^{\infty} \frac{dx}{x^{9}}∫1∞x9dx, or state that it diverges.Check Show answer Walk through it step by step Practice more like this Review this concept