1 | 1 | 1 | n | ||||
+ | +...+ | = | |||||
1*2 | 2*3 | n(n+1) | n+1 |
1 | 1 | 1 | |||
= | − | ||||
n(n + 1) | n | n + 1 |
1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |||||||||
1− | + | − | + | − | + | −.........+ | − | = | ||||||||
2 | 2 | 3 | 3 | 4 | 4 | n | n+1 |
1 | n+1−1 | n | ||||
=1− | = | = | ||||
n+1 | n+1 | n+1 |
5^2 | 52 |
2^{10} | 210 |
a_2 | a2 |
a_{25} | a25 |
p{2} | √2 |
p{81} | √81 |
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