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If f:x->y, where x and y are sets conta...

If `f:x->y,` where `x and y` are sets containing natural numbers, `f(x)=(x+5)/(x+2)` then the number of elements in the domain and range of `f(x)` are, respectively. (a) `1 and 1` (b) `2 and 1` (c) `2 and 2` (d) `1 and 2`

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