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If A = {-2,-1, 0, 1,2} and f: A to B is ...

If `A = {-2,-1, 0, 1,2} and f: A to B` is a surjection defined by `f(x) =x^(2) +x+1`, then find B.

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The correct Answer is:
`therefore B = f(A) = {1,3,7}`
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