Question

determime o zero das funçoes ?
a) y=x+7
b) y=-3x+6
c) y=3x-1

Answer 1

A - f(x) = x + 7
f(x) = 0
x+7=o
x= -7

B - f(x) = -3x + 6
f(x) = 0
f(x) = - 3x+6 = 0
-3x=-6
x= -6/-3 
x = 2

C = f(x) = 3x-1
f(x)=0
3x-1 = 0
3x = 1
x = 1/3