Answer:
-5x^5 + 2x^3 - 6x should be your answer
Answer:
f[g(1)]=6.
Explanation:
Given f(n) and g(n) defined below:

First, we evaluate g(1):

Therefore:

Therefore, f[g(1)]=6.
Two cheaper books = x
more expensive = 1.5x
so, 2.5x=150
150/2.5=x=60
therefore the more expensive book = 90