Question

dadas as funções f(x)= 5x+3 e g(x)= 2x-7 determine
a) f(3)=
b) g(5)=
c) g(f(0))=
d) f(g(x))=
f) g(f(x))=

Answer 1

a) f(3) = 5 × 3 + 3 = 15+3 = 18

b) g(5) = 2 × 5 - 7 = 10 - 7 = 3

c) g(f(0)) = g(3) = 2 × 3 - 7 = -1
f(0) = 5 × 0 + 3 = 3

d) f(g(x)) = 5(2x-7) + 3 = 10x - 35 + 3 = 10x -32

e) g(f(x)) = 2(5x+3) - 7 = 10x + 6 - 7 = 10x - 1