Question

– Determine o zero de cada função abaixo:
a) f(x) = 2x – 6
b) f(x) = 8x – 4
c) f(x) = 3x + 9
d) f(x) = -2x + 4
e) f(x) = 7x – 5
f) f(x) = 10x + 5
g) f(x) = x – 5
h) f(x) = - 6x – 2
i) f(x) = - 7x + 5

me ajudem pfvvv

Answer 1

Explicação passo-a-passo:  sendo f(x) = 0 para todas as questões logo:

a)  0 = 2x – 6 ---->   2x = 6  ---> x = 6/2 -----> x = 3

b)  0 = 8x – 4 ---->   8x = 4--->   x = 4/8 ----> x= 1/2

c) 0 = 3x + 9 ----->  3x = -9 ----->  x= -9/3 ---> x = -3

d)  0 = -2x + 4 --->   2x = 4  ----> x = 4/2 -----> x = 2

e) 0 = 7x – 5  ---->  7x = 5 ----->  x = 5/7

f)  0= 10x + 5 ------>  10x = -5 ----->  x = -5/10 ---> x=  -1/2

g)  0= x – 5  ---->      x = 5

h)    0= - 6x – 2  ---->     6x = -2   ----> x= -2/6 ---->  x = -1/3

i)   0= - 7x + 5  ---->   7x = 5 ----->  x = 5/7

Answer 2

Resposta:

a) f(x) = 2x – 6

b) f(x) = 8x – 4

c) f(x) = 3x + 9

d) f(x) = -2x + 4

e) f(x) = 7x – 5

f) f(x) = 10x + 5

g) f(x) = x – 5

h) f(x) = - 6x – 2

i) f(x) = - 7x + 5