Question

Determine os zeros das funções a seguir:
a) y=5x+2
b) y=-2x
c) f(x)=x/2+7
(plano cartesiano)

Answer 1

a) y=5x+2 ==> 5x + 2 = 0 => 5x = - 2 ==> x = -2/5

b) y=-2x ==> -2x = 0 (-1) 2x = 0 ==> x = 0

c) f(x)=x/2+7 ==> x + 7 = 0 ==> x + 14 = 0  ==> x = - 14 
                            2