Question

VA ROG MUUUUULLLTTTT
AM TEST​

Answer 1

Răspuns:

Explicație pas cu pas:

a) 4x-8 < 16 <=> 4x < 16+8 <=>

4x < 24   I:4  => x < 6  sau x ∈ (-∞ , 6)

b) 4-2(2+x) ≥ x <=> 4 - 4 -2x ≥ x <=>

-2x -x ≥ 0 <=> -3x ≥ 0 <=> 0 ≥ 3x => 3x ≤ 0 => x ≤ 0 sau x ∈ (-∞ , 0]

c)  ²⁾x - (x+1)/2 ≤ ²⁾3 <=> 2x - x - 1 ≤ 6  => x ≤ 7  sau x ∈ (-∞ , 7]

d) 7√2(x-3) - x(3√2+1) ≤ 2x(2√2+3) <=>

7√2x - 21√2 -3x√2 -x ≤ 4x√2 + 6x <=>

7x√2 - 4x√2 -3x√2-x-6x ≤ 21√2  <=>

-7 x ≤ 21√2   I:7 =>

-x ≤ 3√2   => x ≥ -3√2  sau x ∈ [-3√2 ; +∞)

Answer 2

Sper ca te-am ajutat!.....