Question

considere a funcao do 1°grau f(x)=-8x+8.determine os valores reais de x que se tenha:

a)f(x)=0
b)f(x)=-8
c)f(x)=3/2
d)f(x)=-4/3
e)f(x)=5/4

Answer 1

a) -8x+8=0 > -8x=-8 > x=1
b) -8x+8=-8 > -8x=-16 > x=2
c) -8x+8=3/2 > 2(-8x+8)=3 > -16x+16 =3 > -16x= -13> x=13/16
d) -8x+8=-4/3 > 3(-8x+8)=-4 > -24x+24=-4 > -24x=-28> x=28/24>x=7/6
e) -8x+8=5/4 > 4(-8x+8)=5 > -32x+32 = 5 > -32x=-27 > x= 27/32