Question

Resolver, em R (reais), as inequações .
a) 3x - 6 < 0
b) - 3x + 6 < 0
c) 6 - 2x >= 0
d) x- 3 < x + 3
e) - x + 3 <= x + 3
f) x - 2 > x + 2

Answer 1

a) 3x-6<0
3x<6
x<6/3
x < 2

b) -3x+6 <0
-3x <-6 ×(-1)
3x>6
x>6/3
x>2

c) 6-2x>=0
-2x>=-6 × (-1)
2x <6
x<6/2
x <3

d) x-3 x-x <3+3
-x <6 ×(-1)
x>-6

e) -x+3=-x-x=<3-3
-2x=<0 ×(-1)
2x>=0
x>=-2

f)x-2>x+2
x-x>2+2
-x>4 ×(-1)
x < -4