Question

considere f(x) = 2x-2 e g(x) = -x+3, se b = g(a), então f(b) vale:????

 

Answer 1

 f(x) = 2x-2

g(x) = - x+3 ==> g(a)= - a +3

b = g(a) ==> b = - a + 3

f(x) = 2x-2

f(b) = 2(- a + 3) - 2

f(b) = - 2a + 6 - 2

f(b)= - 2a + 4