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gameboykid


1) Chứng minh Bất Đẳng Thức sau:
a)[TEX]2^n^+^2>2n+5[/TEX]..............(n\geq1)
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b)[TEX][(n+1)!]^n<2!4!...(2n)![/TEX].....(n\geq2)
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c)(2n)!<[TEX]2^2n.(n!)^2[/TEX]
a)[TEX]2^n^+^2>2n+5[/TEX]..............(n\geq1)
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b)[TEX][(n+1)!]^n<2!4!...(2n)![/TEX].....(n\geq2)
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c)(2n)!<[TEX]2^2n.(n!)^2[/TEX]