MathCastle
PutnamSuperchallengeIntegrals I: Feynman's Trick

Integrals I: Feynman's Trick · Superchallenge problem

Let f(x)=11−xf(x) = \dfrac{1}{1 - x} and write f(n)f^{(n)} for the nn-fold composition. Compute f(2026)(2)f^{(2026)}(2).