Question

ex 2 si 3 a va roggggvgggggb

Answer 1

1. a=√4*3=√12
  b=3√2=√9*2=√18 a<b

2.A= {√2;2;2√2;4;4√2}... A∩Q= {2;4}


3. a)A= [-2;'2]


b) 0<2x+1<3
-1<2x<2
-1/2<x<1 B=(-1/2;1)

c) |2x+3|≥2
  2x+3∈(-∞,-2]∪[2,∞)
 2x∈(-∞;-5]∪[-1,∞)
 x∈(-∞;-5/2]∪[-1/2,∞)