Sofia used these steps to find the inverse of function f. 35
Step 1
given
35
Step 2
y =
change (+) to y
Step 3
I=
8
switch x and y
Step 4
8 = 3y + 4
multiply each side by 8
Step 5
85 - 4 = 3y
subtract 4 from each side
Step 6
245 – 12 = y
multiply each side by 3
Step 7
245 - 12 = 1-45
replace ywith /- :)
Use this information to complete the statement.
Sofia made a mistake in step
She should have
divided each side by 8 instead of multiply
restricted the domain to x > 0
added 4 to each side instead of subtract
replaced x with f(x)
divided each side by 3 Instead of multiply