Question

determine algebricamente, o zero( ou raiz) das seguintes funções do 1 grau
a)y=x+3

b)y=2x-8

Answer 1

a) f(x) = 2x - 8

2x - 8 = 0

2x = 8

x = 8/2

x = 4

b) f(x) = 5x

5x = 0

x = 0/5

x = 0

c) f(x) = 2/3x + 1

2/3x + 1 = 0

2/3x = -1

x = -1 .  3

          2

x = -3/2

d)f(x) = 4 - 5/2x

4 - 5/2x = 0

-5/2x = -4

x = -4 . 2

         -5

x = -8/-5

x = 8/5