Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x.

f of x equals eight divided by x and g of x equals eight divided by x

Question

Confirm that f and g are inverses by showing that f(g(x)) = x and g(f(x)) = x. 

f of x equals eight divided by x  and g of x equals eight divided by x

anonymous · Answer

f(x)=8/x   
g(x)=8/x     is that right?

anonymous · Answer

yes

psymon · Answer

Replace the x in f(x) with the whole function g(x) and then do the same with with g(x). If both times you can simplify the function down to equal x, then they are inverses.

anonymous · Answer

well then you just plug in

 f(g(x)) = x

f(x)=8/x   
g(x)=8/x 

first lets do f
f(8/x)=8/x   =  8/(8/x)=  8* x/8 =x

anonymous · Answer

so that is is true and same goes for g

g(8/x)=8/x=   8/(8/x) = x cuzz the 8 cancels

anonymous · Answer

thanks youu(: