Question: Let f(x) = ar3 + bx2 + ex + d, where a, b, c, de R and a # 0. Prove that f (r) must

Let f(x) = ar3 + bx2 + ex + d, where

Let f(x) = ar3 + bx2 + ex + d, where a, b, c, de R and a # 0. Prove that f (r) must have a root. That is, prove f(2) =0 for some z E R

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