## Adi3 one year ago please help will medal For each of the following functions: (i) find f^-1 (x) and the funtions are f(x) = (3 - 2x)/4

We need to inverse $\frac{ 3-2x }{ 4}$

but I don't know how to fo it.

@phi

4. rishavraj

I don't get that

6. rishavraj

replace f(x) with "y" so its y = (3 - 2x)/4

7. rishavraj

and then switch x and y .... so u will get x = (3 - 2y)/4 and then solve for y

so for solving for y we do |dw:1442232845898:dw|

so is it gonna be 3/4+ 2

when we solve for Y

11. rishavraj

hmmm see. x = (3 - 2y)/4 multiply 4 onn both sides.... u will get 4x = 3 - 2y so 3 - 4x = 2y now get y

how do u get y?

is it |dw:1442233372467:dw|

14. rishavraj

nah see i askd u to switch x and y so u will get $x = \frac{ 3 - 2y }{ 4 }$

15. rishavraj

so multiply 4 on both side . u will get 4x = 3 - 2y

is back to the same thing

17. rishavraj

then 3 - 4x = 2y so y = (3 - 4x)/2