Question

5x2virgula 4+xmai mic ca 15? 5xmai mic ca 20virgula5? 18virgula32+2xmai mic ca 20virgula4? 2virgula9x1virgula5mai mare ca x+2? 8la puterea2:4la a doua-0virgula64mai mare ca x+2virgula73

Answer 1

5 • 2,4 + x < 15 => 12 + x < 15 => x ∈ {0; 1; 2), x ∈ N;
5x < 20,5 => x ∈ {0; 1; 2; 3; 4}, x ∈ N;
18,32 + 2x < 20,4 => x ∈ {0; 1}, x ∈ N;
2,9 • 1,5 > x + 2 => 4,35 > x + 2 => x ∈ {0; 1; 2}, x ∈ N;
$8^{2}$ : $4^{2}$ - 0,64 > x + 2,73 => $(8 : 4)^{2 - 2}$ - 0,64 > x + 2,73 => $2^{0}$ - 0,64 > x + 2,73 => 1 - 0,64 > x + 2,73 => 0,36 > x + 2,73 => x ∈ Ø.