Question

If F(x)=9x which of the following is the inverse of F(x)?

A) F^1(y)=Y/9
B) F^1(y)=9/y
C) F^1(y)=y-9
D) F^1(y)=y+9

Answer 1

@whpalmer4 can you please help me? :)

Answer 2

@ganeshie8 what about you? :)

Answer 3

So do you know the general process?

Answer 4

i need to flip it around so that it is opposite right?

Answer 5

Kind of... I'll guide you through it. :)

You first need to switch the x and y variable. What would that look like?

Answer 6

(The f(x) counts as the y here)

Answer 7

So F(y)=9?

Answer 8

Nearly. You would get,

f(x) = 9x
y = 9x
x = 9y

See how the variables were switched?

Answer 9

yeah

Answer 10

So then you solve for y

Answer 11

So what is y?

Answer 12

uuum

Answer 13

i feel stupid lol

Answer 14

No worries. It's just basic algebra. If you see that 9 and y are multiplied together, and you want y by itself, how do you do it? The opposite of multiplication is...

Answer 15

division

Answer 16

so divide it by 9y?

Answer 17

Y=1?

Answer 18

You're going to just divide by 9, to isolate y