@surjithayer @Luigi0210

Question

anonymous · Answer

attachment

luigi0210 · Answer

Isn't that the same question?

anonymous · Answer

oooo sorry hold on

anonymous · Answer

attachment

anonymous · Answer

i think its (x+4)1 idk if im correct

luigi0210 · Answer

Did you switch y and x?

anonymous · Answer

its suppose to be y

luigi0210 · Answer

This is how you start:
$$x=\frac{y}{4}-1$$
Solve for y

luigi0210 · Answer

*+1 
Sorry

anonymous · Answer

@divagirl421 ,
To be fair, I have not worked very much with these types of problems. I believe your correct in accordance with my Algebraic background. But, be sure to check your work to insure your correct.

God Bless, and have a wonderful night!

$\color{red}{Chance}$

___________________________________________
@Luigi0210 
I learned to do Latex.

anonymous · Answer

1/4y+1?

anonymous · Answer

@Luigi0210

luigi0210 · Answer

Switch y and x from the original
$$x=\frac{y}{4}+1$$
Subtract 1
$$x-1=\frac{y}{4}$$
Multiply by 4
$$4x-4=f^{-1}(x)$$

luigi0210 · Answer

Is it asking for the inverse of x or y? Psymon.

psymon · Answer

y. Interesting, looks like a trick question.

luigi0210 · Answer

Exactly

psymon · Answer

You need to rearrange the function to make it a function of y first. 
y = (x/4) + 1 So to make f(y), we solve for x first. 
x = 4(y-1) = f(y)
Now find the inverse of that.

anonymous · Answer

so i just switch then solve

anonymous · Answer

i believe its x

psymon · Answer

Nah, it says to find the inverse of f when it is a function of y. Which means you have to solve for x first before you switch any variables. You dont do the inverse process until you solve for x in the original.

anonymous · Answer

its 4y-4

psymon · Answer

x= 4y-4. This is your f(y). Now find the inverse of that.

anonymous · Answer

thats the answer

psymon · Answer

Is that what it says?

luigi0210 · Answer

Was I right the first time? o_O

anonymous · Answer

@Luigi0210 yes you just needed the y i guess you have to change it back

psymon · Answer

I swear that makes no sense. Luigi did it correctly if it were f^-1(x), but it said f^-1(y) in thhe question. Whatever -_-

luigi0210 · Answer

I got stumped on one of those before.. which is why I called my smart buddy over :3

psymon · Answer

Lol, her question is misleading then if none of that is a typo :/

anonymous · Answer

yea i hate these ones they even confuse my teachers

psymon · Answer

Id say its written incorrectly.

anonymous · Answer

no its correct its in my textbook to

psymon · Answer

Textbooks arent always correct, lol. I swear that doesnt make sense x_x Until someone I trust tells me no, lol.

psymon · Answer

Oh well, thats why you ask luigi and not me, lol.