Find the inverse of the function. State any restrictions on the domain.

f(x) = x^2 + 9

The function is not invertible if you think of it as

because it is not injective:

So, if we restrict the domain to the positive numbers only:

Note that the range is actually , so we can be more precise and write

To find the inverse, we solve the expression for x:

But since we restricted to positive values of x, the inverse is

there would be 365 different 4 digit numbers

step-by-step explanation:

i belive that it is 365 because i asked google

i need a picure

step-by-step explanation: