Modulus & Inequalities (id: 360d21032)

本题目来源于试卷: Modulus & Inequalities，类别为 IB数学

[问答题]
1. Solve the inequality :cfjr9 ejz; i1hfiwp ,/c.ft.6u5plh ofqc 7(s3 *v7bqnucs :$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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