a Decide if x y EN x y 25 is a function b Given f R R f x x 2 5 mod 5 and g Z Z 9 x x 4x 18 i check if f A 9 A where A 0 4 nz 2

Question

a Decide if x y EN x y 25 is a function b Given f R R f x x 2 5 mod 5 and g Z Z 9 x x 4x 18 i check if f A 9 A where A 0 4 nz 2 ii find f 2 4 nZ g 3 1 c Sketch on separate sets of axes X 1 5 and X 2 4 and therefore X 1 5 2 X 2 4 4

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