Question

1-Determine o Zero das funções a seguir:
a)f(x)= x-4



b)f(x)= x+10



c)f(x)=2x-4



d)f(x)=5x+15



e)f(x)=3x+10



f)f(x)=8x-20

Answer 1

Resposta:

a) x= 4

b)x= -10

c)x= 2

d)x= -3

e)x= -10/3 = -3,33

f)x= 20/8 = 2,5

Explicação passo-a-passo:

a) x-4=0 -> x= 4

b)x+10=0 -> x= -10

c)2x-4=0 -> 2x=4 -> x=4/2 = 2

d)5x+15=0 -> 5x=15 -> x= -3

e)3x+10=0 -> 3x=-10 -> x= -10/3= -3,333

f)8x-20=0 -> 8x=20 -> 20/8= 2,5

Answer 2

a) x+4=0   x= -4  

b) x+10=0  x= -10

c) 2x-4=0   2x= +4   x=4÷2 x=2

d) 5x+15=0   5x= -15   x= -15÷5   x=-3

e) 3x+10=0   3x= -10   x= -10÷3   x= -3,333...

f) 8x-20=0   8x=+20   x= 20÷8   x= 2,5