Question

Dadas as funções, f(x) = 2x +12, g(x) = -2x +5, h(x-3) = 3x + 1 e p(3x + 7) = -4x +11, calcule:

a) f(3)
b) f(-5)
c) g(10)
d) f(-1) + g(2)

Answer 1

f(x) = 2x +12, g(x)

a) f(3) ---> f(3) = 2.3 +12= 6 + 12= 18

b) f(-5) ---> f(-5) = 2.(-5) +12= -10 + 12= 2

g(x) = -2x +5

c) g(10) ---> g(10) = -2.(10) +5= -20 + 5= -15

d) f(-1) + g(2)

f(x) = 2x +12 ---> f(-1) = 2.(-1) +12= -2 +12= 10

g(x) = -2x +5 ---> g(2) = -2.2 +5= -4 + 5= 1

f(-1) + g(2)= 10 +1= 11