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an= | ||||||||
an+1 | ||
limn→∞ | ||
an−3 |
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= | |||||||||||
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(2n+1)! | (n−2)! * (n−5)! | |||
= | * | = | ||
(n+2)!*(n−1)! | (2n−7)! |
(2n−6)(2n−5)(2n−4)(2n−3)(2n−2)(2n−1)*2n*(2n+1) | ||
= | ||
(n−1)*n*(n+1)(n+2) * (n−4)(n−3)(n−2)(n−1) |
5^2 | 52 |
2^{10} | 210 |
a_2 | a2 |
a_{25} | a25 |
p{2} | √2 |
p{81} | √81 |
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