Question

Rezolvati in mulrimea nr naturale inecuatiile : a) x-1,37 < 5,3 ; b) x+2,47 < sau egal decât 5,3 ; c) x-2,37 mai mare sau egal decât 2,3 radical din 2

Answer 1

a. x<5,3+1.37, x<6,67, x∈{0,1,2,3,4,5,6}
b. x≤5,3-2,47, x≤2,83, x∈{0,1,2}
c. x≥2,3²+2,37=7,66, x∈{7,8,9....}

Answer 2

a) x-1,37∠5,3 /+1,37
    x∠ 6,67          x∈{6, 5, 4, 3, 2, 1, 0}

b) x+2,47≤5,3 /-2,47
    x≤2,83           x∈ {0, 1, 2}

c) x-2,37≥2,3√2
    x-2,37≥2,3×1,4142
    x-2,37≥3,25 /+2,37
    x≥5,62             x∈{6, 7, 8, 9, .........+∞}