Question

Determine os zeros das funções reais: a) y= 3x b) y=2x+1 c) y= x-4 d) y=15-3x

Answer 1

a)
y=3x
3x=0
x=0/3
x=0
S={0}

b)
y=2x+1

2x+1=0
2x=-1
x=-1/2
S={-1/2}

c)
y=x-4
x-4=0
x=4
S={4}

d)
y=15-3x

15-3x=0
-3x=-15
3x=15
x=15/3
x=5
S={5}