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2. For the following function definitions, determine if they are 0) a function, 1) injective, 2) surjective, and 3) have inverse function and 4) if

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2. For the following function definitions, determine if they are 0) a function, 1) injective, 2) surjective, and 3) have inverse function and 4) if they do, find their inverse function. Briefly explain why. (5 pts each) (a) f:NZ given by f(x)=2x+5,xN (b) f:ZN given by f(x)=2x+5,xZ

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