Question

@kittyxie1
If f(x) = 3x – 5, then what is f–1(x) ?
can you help

Answer 1

if f(x) = 3x – 5,
or y = 3x – 5

swap the letters and what do you get?

Answer 2

explain f-1(x)?

Answer 3

its f^-1

Answer 4

\(\huge f^{-1} \implies\) inverse function

Answer 5

so what do i flip?

Answer 6

inverse function
y=(x+5)/3

Answer 7

so, if you swap the variables, what would you get?

Answer 8

no flip, just swap them out

Answer 9

exchange x and y so it is x=3y-5, plus 5 on both sides,

Answer 10

First set the equation = y

y = 3x - 5

replace x and y in this function

x= 3y - 5

Now solve for y again.

x + 5 = 3y

y = (x + 5)/ 3

Rewrite it as inverse.

f^{-1}(x) = (x + 5)/3

Answer 11

ohhhh . thank you alll ! . Now im really bad at graphing and i dont know hot to. and the qestion is graph f(x) = –x4 + 2.

Answer 12

f(x) = -x^(4) + 2?

Answer 13

yess

Answer 14

f(x) = 3x – 5
y=3x-5

f–1(x)
x=3y-5

Answer 15

now find y

Answer 16

http://www.sketchtoy.com/ @Lesha . First graph y=x^4 + 2 by finding the x and y intercepts and then flip the graph over.

Answer 17

i dont know how to .

Answer 18

x=y^4+2

Answer 19

@angie041397 are you trying to show her how to find the inverse of the graph?

Answer 20

yeah thats how u do the inerse in a equation