Sender: "Leanne Hickey"
Subject: inverses of functions
heres the question....
Let f(x) = 2x2 -3x + 2. Find f-1(4) given the fact that f(2) = 4. So the question is finding the inverse of 4, he said it's easier than it looks.
Functions behave like the square root button on a calculator. You give it a number and it gives you an answer. If you give the square root function the number 16 it gives you the answer 4. For your function f(x) = 2x2 -3x + 2 if you give it the input number 2 it gives you the answer 4 and if you give it the input number 3 it gives you the answer 11.