et G = {fab | a, b € R, a 0}, where f(x) = ax + b for all real x. Consider the group G under the composition of mappings, What is the inverse of the element f1,5? O f5,1- O $1. o f. f(-5).

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A: Given a and b be elements of a group G. a = a−1 and b = b−1

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A: See the attachment

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A: please find the attached image.

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A: