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If f(x) : X to Y and A, B sube X, then f...

If `f(x) : X to Y` and `A, B sube X`, then `f(A nn B)` is equal to

A

`f(A) - f(B)`

B

`f(A) nn f(B)`

C

A subset of `f(A) nn f(B)`

D

`f(B) - f(A)`

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