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Masala #2XSSXNS6YH

Xotira 16 MB Vaqt 1000 ms
14
Muallif: Otabek Aralov Abduxamitovich

For #28

n butun soni va x haqiqiy soni berilgan (n > 0, |x| < 1). Quyidagi yig’indini hisoblovchi dastur tuzing. 
\(1+x/2-1 *x^2/(2 *4) + 1*3*x^3/(2*4*6)-... + (-1)^{n-1} *1*3* ...*(2*n-3)*x^n/(2*4*..*(2*n))\)

( Massivdan yoki [ ] amaldan foydalanmang kodda! )

Kiruvchi ma'lumotlar:

Birinchi qatorda n butun son kiritiladi.  1≤n≤1000

Ikkinchi qatorda x haqiqiy son kiritiladi. |x|<1

Chiquvchi ma'lumotlar:

Masala javobini namunadagidek chop eting.

Misollar
# input.txt output.txt
1 
3
1.2
 
1.52800000
2 
3
-0.3
 
0.83706250

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