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1048. Сумма ряда.

Time Limit: 1 seconds
Memory Limit:65536KB
Points:2
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Даны действительное число a, натуральное число n. Вычислить:

pic.gif

Input

Вещественное число e (e>0).

Output

Бесконечная сумма с заданной точностью.

Sample

Input Output
0.1
 
1.36111
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1042. Сравнение двух чисел 1048. 1090. Условие существования треугольника 1031. а25 1036. а59з
We can all benefit by doing occasional "toy" programs, when artificial restrictions are set up, so that we are forced to push our abilities to the limit. The art of tackling miniproblems with all our energy will sharpen our talents for the real problems. Donald E. Knuth.
time generating 0.11 sec.
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