Question

The range of the function f(k) = k2 + 2k + 1 is {25, 64}. What is the function’s domain?
{5, 8}
{-5, -8}
{3, 8}
{4, 7}
{4, 8}

Answer 1

Would I do f(k)=25 Then substitute x in the answers so see if its true, then if it is, do f(k)=64 and sub in y in the answers to see if its true. If both work thats the answer?

Answer 2

@amistre64

Answer 3

@Stormswan