- #1

- 23

- 0

the question is

let f(x)=5+2x+5e^x

f^-1(10)=?

i keep messing up on these problems and now im not really sure where exactly 2 start...i know i gotta find the inverse but i would appreciate some help on getting started on this problem.....thx

You are using an out of date browser. It may not display this or other websites correctly.

You should upgrade or use an alternative browser.

You should upgrade or use an alternative browser.

- Thread starter sonya
- Start date

- #1

- 23

- 0

the question is

let f(x)=5+2x+5e^x

f^-1(10)=?

i keep messing up on these problems and now im not really sure where exactly 2 start...i know i gotta find the inverse but i would appreciate some help on getting started on this problem.....thx

- #2

HallsofIvy

Science Advisor

Homework Helper

- 41,847

- 966

However, the problem does NOT ask you to find "f

Can you think of a value of x such that f(x)= 10 and what does that have to do with the problem?

- #3

- 23

- 0

well....f(x)=10 when x=0

but i dont c ne relation btwn that and the inverse...

but i dont c ne relation btwn that and the inverse...

- #4

HallsofIvy

Science Advisor

Homework Helper

- 41,847

- 966

Two functions (call them f and g) are "inverse" to each other (here's the "formal" definition) if and only if f(g(x))= x and g(f(x))= x for all x.

If f(x)= y, then f

Since f(0)= 10, f

Whenever f(a)= b, then f

if f: x-> y then f

- #5

- 23

- 0

thats it?....how come it looks so simple now?....neways thx 4 clearing things up!...

Share: