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Algebra Difficulty 3.0 AMC 10/12 Find the answer Canada

If $\sqrt{\dfrac{3}{1}\cdot\dfrac{5}{3}\cdot\dfrac{7}{5}\cdots\dfrac{2n+1}{2n-1}} = 9$ , then the value of $n$ is

(A) $38$ (B) $1$ (C) $40$ (D) $4$ (E) $39$

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