In f: Z--->N (where N represents natural numbers and Z represents integers.

For the function f(x) = 2|x|, find the pre-image of the set {10, 11, 12, ... , 19}

Would it be {-9, -8, -7, -6, -5, 5, 6, 7, 8, 9}?

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- Apr 22nd 2012, 03:27 PMCantubaFinding the Pre-Image
In f: Z--->N (where N represents natural numbers and Z represents integers.

For the function f(x) = 2|x|, find the pre-image of the set {10, 11, 12, ... , 19}

Would it be {-9, -8, -7, -6, -5, 5, 6, 7, 8, 9}? - Apr 22nd 2012, 03:36 PMPlatoRe: Finding the Pre-Image