Question

considere a função f(x)= -4x+2 determine x para :

a) f(x)=0
b) f(x)=10
c) f(x)=4

Answer 1

a) -4x+2=0
-4x= -2
x= -2/-4
x= +2/4
x=1/2

b) -4x+2= 10
-4x= 10-2
-4x= 8
x=8/-4
x=-2

c) -4x+2= 4
-4x= 4-2
-4x= 2
x=2/-4
x= - 1/2