Question: (a) Let f and g be two functions defined from R R with f(x) = x + 1 and g(x) = x - 1.

(a) Let f and g be two functions defined from R R

(a) Let f and g be two functions defined from R R with f(x) = x + 1 and g(x) = x - 1. Find (gof)(1), (gof)(2) and (gof)(x). (b) One of the following function f : R R below is a bijection. Which one is it? Explain your answer. i. f(x) = x + x for all x E R ii. f(x) = x + x for all x ER iii. f(x) = x - x for all x ER iv. f(x) = x x for all x ER [4]

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