SOLUTION: what is the value of f[g(2)] if f(x)=-2x-1 and g(x)=-x

Algebra ->  Functions -> SOLUTION: what is the value of f[g(2)] if f(x)=-2x-1 and g(x)=-x      Log On


   

Question 972945: what is the value of f[g(2)] if f(x)=-2x-1 and g(x)=-x
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

if f%28x%29=-2x-1 and g%28x%29=-x, then
to find f%28g%282%29%29 first find g%282%29
g%282%29=-2
so,f%28g%282%29%29=f%28-2%29
f%28-2%29=-2%28-2%29-1
f%28-2%29=4-1
f%28-2%29=3