# Math Help - [SOLVED] prove/disprove (composition is commutative)

1. ## [SOLVED] prove/disprove (composition is commutative)

Prove or disprove the following statement: Function composition is commutative; that is, if
f : R --> R and g : R --> R,

then (
f o g)(x) = (g o f)(x) for all x in R.

all the R are real numbers. i just don't know how to get the doubled bar R

2. Originally Posted by jconfer
Prove or disprove the following statement: Function composition is commutative; that is, if
f : R --> R and g : R --> R,

then (
f o g)(x) = (g o f)(x) for all x in R.

all the R are real numbers. i just don't know how to get the doubled bar R
Think about these: $f(x) = x^2 \,\& \,g(x) = \sin (x)$.