Question

calcule o zero de cada função f (x) = 0.

a) f (x) = 3x - 6
b) f (x) = - x + 9
c) f (x) = - 2x - 8
d) f (x) = 1/5 x -7
e) f (x) = - 4x + 1

Answer 1

a) f (x) = 3x - 6 = 0

x = 2

b) f (x) = - x + 9 = 0

x = 9

c) f (x) = - 2x - 8 = 0

x = -4

d) f (x) = 1/5 x -7 = 0

x = 35

e) f (x) = - 4x + 1 = 0

x = 1/4

Answer 2

Olá.

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

b) -x + 9 = 0       --->   -x = -9        -->     x = 9

c) -2x - 8 = 0        -->  -2x   =  8      ---> 2x = -8   -->  x = -8/2   -->  x = -4

d) x/5 - 7 = 0   -->  x/5  = 7   --->     x = 35

e) -4x + 1 = 0       -->  -4x  = -1        -->  4x  =   1   --->   x = 1/4