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0069. Sikl9
Time limit : 1000 ms
Memory limit : 64 mb
Berilgan ketma-ketlikni dastlabki n ta xadi yig’indisini toping
$$S = - x + \frac{x^2}{2!} - ...+ (-1)^n \frac{x^n}{n!}$$
Kiruvchi ma’lumotlar:
ikkita butun son $n$ va $x$ $(0 \le n,x \le 9)$;
Chiquvchi ma’lumotlar:
$S$ – ketma-ketlikni dastlabki $n$ ta xadi yig’indisi $10^{-3}$ aniqlikda chiqarilsin.
Input |
---|
1 1 |
Output |
-1.000 |
Input |
---|
0 2 |
Output |
0.000 |