Question

can someone help me find an equation for the inverse of the function. f(x)=2x - 3^x/4

Answer 1

lmLtfy :p

\(\large f(x)=2x - \frac{3^x}{4}\) ??

Answer 2

Yes that's it

Answer 3

i don't think you can do it because as soon as you try to get that x out of the exponential, you lock the other x in a log

do you know if there is an answer and what that answer is? if so i can try to hack it or you can bump and wait for someone else to come along

to complicate matters, the other thing is this fails the so-called Horizontal Line Test - there is a local maximum, as you can see from the attached, so for f(x), 2 x's can map to the same y; but the inverse would require the opposite, ie that 1 y maps to 2 x's so there is no function

so that you would need to restrict the domain to the LHS or RHS of the turning point ....

not that helpful, i know :p

Answer 4

Wel the the multiple choice answers provided for this question are:
A. f^-1(x)=3x-2
B. f^-1(x)=- 3/4x+2
C. f^-11(x)=4/5x
D. f^-1(x)=4/5x+3/4
I'm just not sure of the answer.

Answer 5

none of these give you an inverse to what you posted


maybe you should post the actual question or a screenshot. i think that could help greatly.

Answer 6

https://mail.google.com/mail/u/0/s/?view=att&th=14f09cf704c0188d&attid=0.1&disp=attd&safe=1&zw

Answer 7

that is think is "your" gmail account !

just a picture, a screen grab , might be really informative, thx.