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hcuitv


Cho :
[TEX]{u}_{0}=1[/TEX]
và
[TEX]{u}_{n+1}={u}_{n}+\frac{1}{{u}_{n}} [/TEX] n=0,1,2,...
Chứng minh:
[TEX]\sum_{n=0}^{k} \frac{1}{{{u}^{4}}_{n}} < \frac{7}{6} [/TEX]
k [TEX]\epsilon [/TEX] [TEX]{N}^{*}[/TEX]
[TEX]{u}_{0}=1[/TEX]
và
[TEX]{u}_{n+1}={u}_{n}+\frac{1}{{u}_{n}} [/TEX] n=0,1,2,...
Chứng minh:
[TEX]\sum_{n=0}^{k} \frac{1}{{{u}^{4}}_{n}} < \frac{7}{6} [/TEX]
k [TEX]\epsilon [/TEX] [TEX]{N}^{*}[/TEX]
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