Răspuns:
a)x∈{0,1,2,3,4,5,6}
b)x∈{0,1,2}
c)x∈{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14}
Explicație pas cu pas:
4
a)x<5,3+1,37
⇒x<6,67
⇒x∈(-∞,6,67)
Dar x∈N ⇒x∈{0,1,2,3,4,5,6}
b)x+2,47≤5,3
⇒x≤5,3-2,47
⇒x≤2,83
⇒x∈(-∞,2,83]
Dar x∈N ⇒x∈{0,1,2}
c)x<2,3³+2,37
⇒x<12,167+2,37
⇒x<14,537
⇒x∈(-∞,14,537)
Dar x∈N ⇒x∈{0,1,2,3,4,5,6,7,8,9,10,11,12,13,14}