Question

Determinati numarul natural a astfel incat: a)6supra a-3 b)a+2supraa+3>sau egal cu 5 supra 9

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Answer 1

6/a-3⇒6=a-3⇒a=-6-3⇒a=-9
a+2/a+3≥5/9⇒5(a+3)≥9(a+2)⇒5a+15≥9a+18⇒5a-9a≥-15+18⇒-4a≥3⇒a≥3/-4⇒a≥-0.75
sucees