Question

Find the inverse function of f(x) = 7x – 9

Answer 1

just like solving
\[7x-9=50\]

Answer 2

except that is wrong! add 9 divide by 7 sorry

Answer 3

\[f^{-1}(x)=\frac{x+9}{7}\]

Answer 4

f(x) = 7x-9
which is the same as y=7x-9
first you always interchange y and x and then you make y the subject of the formula
x=7y-9
x+9 = 7y
(x+9)/7 = y

Answer 5

okay. thank you!