Question

calcule a raiz da função
a) f(x)=x+4
b) f(x)=2x-8

Answer 1

Ola Sirlei

a)

x + 4 = 0
x = -4

b)

2x - 8 = 0
2x = 8
x = 8/2 = 4

.

Answer 2

a) f(x)=x+4    de -1 a 2
f(-1)=(-1)+4=3
f(0)=0+4=4
f(1)=1+4=5
f(2)=2+4=6

b) f(x)=2x-8
f(-1)=2(-1)-8=-10
f(0)=2(0)-8=-8
f(-1)=2(1)-8=-6
f(-1)=2(2)-8=-4