ChallengeChallenge ShareChallenge · Challenge problemCompute ∏k=220(1−1k2)\displaystyle\prod_{k=2}^{20}\left(1 - \frac{1}{k^2}\right)k=2∏20(1−k21).A12\dfrac{1}{2}21B2140\dfrac{21}{40}4021C120\dfrac{1}{20}201D1940\dfrac{19}{40}4019E2120\dfrac{21}{20}2021Check Show answer Walk through it step by step Practice more like this