Question

Calcule o zero de cada função
A) f (x) = 3x - 12
B) f (x) = - x + 9
C) f (x)= 2 (x)= 2x +3/4
D) f (x)= - 1/5 x - 6

Answer 1

A) f(x)=3x-12
f(x)=3x-12=0
f(x)=x=12/3=4
x=4

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

C) f(x)= 2 (x)=2x+(3/4)
f(x)=2x+(3/4)=2
2x=2-(3/4)
2x=1/4
x=((1/4)/2)
x=1/8

D)f(x)=-1/5x-6
f(x)=-1/5x-6=0
x=-6/1/5
x=-30