Question

Dada a função f (x)= 4x+12, calcule :
a) f(-2)
b) f(x)= 1/3

Answer 1

a) f(-2)= 4(-2)+12=4
b) f(1/3)= 4(1/3)+12= 4/3+36/3=40/3

Answer 2

a) f(-2)

4x+12=

4·(-2)+12=

-8+12=

4


B) f(1/3)

4x+12=

4·1/3 +12=

4/3+12=

(MMC de 3 e 1 é igual a 3)

4/3+36/3=

40/3