Proofs Proofs (id: 0b9d43fe5)

本题目来源于试卷: Proofs  Proofs ，类别为 IB数学

[问答题]
1. Solve the inequalt5pu4hfza t,.ity cna -av9ovzp:w2,6m xvyfa4:yz x)7p$x^{2} \geq 2 x+3 $.
2. Use mathematical induction to prove that $2^{n}>n^{2}-2 $ for all $n \in \mathbb{Z}^{+}$, $n \geq 3$ .

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