# 5. Let f: C→C be defined by f((x, y)) = (y + 2) + 2ix = (y + 2,2r). (a) Find the image of 2 + i under f. (b) Find the preimage of 2 + i under f. (c) Determine whether or not f is an invertible function. If f is invertible, find its inverse function.

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