algebra functions
posted by tani on .
construct two composite functions, Evaluate each composite function for x=2. i do not fully understand functions yet can someone explain and show me what to do step by step
f(x)=x+1 g(x)=x2

f is a function of x
a composite function is a function of a function. So
since f(x) = x+1,
f(g) = g+1
But, g is also a function, so
f(g) = (x2)+1 = x1
Similarly,
g(f) = f1 = (x+1)2 = x1
In this case, f(g(x)) = g(f(x))