https://math.csudh.edu/webwork2/21Fall_csum_MAT100/ username: jcendana92 passwork: Hyperx1lakers

Jaspher Dulay 21Fall csum MAT100
Assignment Chapter 3 Section 4 Compositions of Functions due 11/02/2021 at 07:00pm PDT
1. (1 point) Given that f (x) =
8
x−4
and g(x) =
7
x+9
, find
the following
(a) ( f +g)(x)= help (formulas)
and its domain is help (intervals)
(b) ( f −g)(x)= help (formulas)
and its domain is help (intervals)
(c) ( f g)(x)= help (formulas)
and its domain is help (intervals)
(d) ( f/g)(x)= help (formulas)
and its domain is help (intervals)
Answer(s) submitted:
• (15*x+44)/(xˆ2+5*x-36)
• R-{4,-9}
• (x+100)/(xˆ2+5*x-36)
• R-{4,-9}
• 56/(xˆ2+5*x-36)
• R-{4,-9}
• (8*x+72)/(7*x-28)
• R-{4,-9}
(correct)
2. (1 point) Given that f (x) = 9x−8, calculate
f ◦ f (−1)=
Given that g(x) = 4− x2, calculate
g◦g(4)=
Answer(s) submitted:
• -161
• -140
(correct)
3. (1 point) The functions f (x) and g(x) are given in the
graph below ( f (x) in red and g(x) in blue).
Note: Click on the graph to view a larger...