Question: Describe a version of the FFT that works when n is a power of 3 by dividing the input vector into three subvectors, recursing on

Describe a version of the FFT that works when n is a power of 3 by dividing the input vector into three subvectors, recursing on each one, and then merging the subproblem solutions. Derive a recurrence equation for the running time of this algorithm and solve this recurrence using the Master Theorem.

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