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Yesterday, 23:14

The range of the function f (k) = k^2+2k+1 is {25,64}. What is the function's domain?

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  1. Today, 00:06
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    [4,7]

    since 25,64 are 5 squared to 8 squared

    and f (k) is (K+1) squared

    then k+1 = 5 and k+1=8 are the parameters

    so k is 4 to 7
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