Posted by **Jeromino** on Thursday, March 31, 2011 at 5:02am.

If f(x)=x and g(x)=x+1 find the function and its domain:

1. gof

2. fof

- math -
**Jai**, Thursday, March 31, 2011 at 5:29am
(gof)(x) means you substitute the whole expression of f(x) to g(x):

(gof)(x) = g(f(x)) = f(x) + 1

(gof)(x) = x + 1

for #2, we do the same,, we substitute f(x) to f(x):

(fof)(x) = f(x)

(fof)(x) = x

hope this helps~ :)

- math -
**Jeromino**, Thursday, March 31, 2011 at 5:38am
Sweet! Thanks

## Answer this Question

## Related Questions

math - Find a. fog b. gof c. fof d. gog for each function f(x)=4-x g(x)=3x-5

math - Find a. fog b. gof c. fof d. gog f(x)=4-x g(x)=3x-5

math - (x) =pi/2-x g(x)= 5sinx/8+cos x find (gof)(pi/2) and (fof)(pi/2)

college algebra - 1. answer the following for the given quadratic function f(x)=...

precalc - f(x) =pi/2-x g(x)= 5sinx/8+cos x find (gof)(pi/2) and (fof)(pi/2)

Algebra - If f(x)= ln x, g(x) = e^3x, and h(x) = x^7, find the following... a) (...

Calculus - Hi there, I need help with composition of functions. I need to find ...

college algebra - 1.for the given function f&g, find the following and state the...

algebra - 2. The function f is defined as follows f(x)={4+2x if x<0 {x^2 if x...

Math - Find the requested function and state its domain: f(x)= 4x+3 g(x)=4x-5 ...