SOLUTION: Suppose that the functions u and w are defined as follows. u(x)=-2x-1 w(x)=2x^2 Find the following. (w*u)(1)= (u*w)(1)=

Algebra ->  Rational-functions -> SOLUTION: Suppose that the functions u and w are defined as follows. u(x)=-2x-1 w(x)=2x^2 Find the following. (w*u)(1)= (u*w)(1)=      Log On


   

Question 1158977: Suppose that the functions u and w are defined as follows.
u(x)=-2x-1
w(x)=2x^2
Find the following.
(w*u)(1)=
(u*w)(1)=
Answer by Amily_2190(27) About Me  (Show Source):
You can put this solution on YOUR website!
(x*y)(z)=(x(y(z)))

(w*u)(1)=(w(u(1)))
u(1)=-2(1)-1=-2-1=-3
w(-3)=2(-3)^2=2(9)=18
(w*u)(1)=18

(u*w)=(u(w(1)))
w(1)=2(1)^2=2(1)=2
u(2)=-2(2)-1=-4-1=-5
(u*w)=-5