109k views
5 votes
If f(x)= 9x-8 and g(x)=x^3,what is (g o f)(1)?

User Miasha
by
6.7k points

1 Answer

0 votes

(f∘g)(3) = f(g(3))


Find g(3) by substituting x=3 in g(x)


g(x)=x²-1

g(3)=3²-1

g(3)=9-1

g(3)=8


f*g(3) = f(g(3)) = f(8)


find f(8) by substituting x=8 in f(x):


f(x)=2x+3

f(8)=2(8)+3

f(8)=16+3

f(8)=19


So f∘g(3) = 19


Sorry I am wrong



User Love Gupta
by
6.8k points