Question

1) Resolva as seguintes inequações representando o conjunto solução e o intervalo númerico IR

a) 2x+≤x+6

b) 2-9x≥x+14

c) 2(x+3)>3(1-x)

d) 3(1-2x)<2(x+1)+x-7

Answer 1

A) 2x+≤X +6

2x-x≤+6

X= ≤= =+6

B) 2 -9x≥X+14

-9x-x ≥ 14-2

-10x ≥ 12 x(-1)

X=≤ -12

C)2(x+3) >3(1-X)

2x +6 > 3 -3x

2x +3x>3-6

5x>-3

X> -3/5

D)3(1 -2x)<2(X +1) +X -7

3 -6x <2x +2 +X -7

-6x -2x-X<+2 -7 -3

-9X<-5-3

-9X< -8 x (-1)

9x>8

X>8/9