Question

Which of the following is a quadratic function?

f(m) = 2/m + 8
f(x) = 2(x - 5)4 + 8
f(s) = 2s + 8
f(t) = 2(t - 5)2 + 8

Answer 1

nothing is quadratic function of above... but correct answer is f(t)

Answer 2

fuction must have domain, not just rule...

Answer 3

Thanks !