Cauchy's Formula for Repeated Integration

Repeated integrations can come up pretty often. It's a bit of a pain but the OG has formula for this. Proof is via induction.

natf(x)dxn=1(n1)!at(tx)n1f(x)dx_n\int_{a}^{t} f(x) d x^{n}=\frac{1}{(n-1) !} \int_{a}^{t}(t-x)^{n-1} f(x) d x

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