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TS EAMCET 2020 (Online) 11th September Evening Shift

MCQ+1 / -02020

The number of bijective functions $f: \mathbf{Z} \rightarrow \mathbf{Z}$ such that $f(x+y)=f(x)+f(y) \forall x, y \in \mathbf{Z}$, is


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