cho P=(1-1/1+2)(-1/1+2+3).........(1-1+2+3+......+2014)
khi đó 2014/2016 x P =- ........
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Cho \(P=\left(1-\frac{1}{1+2}\right)+\left(1-\frac{1}{1+2+3}\right)...\left(\frac{1}{1+2+..+2014}\right)\). Khi đó \(\frac{2014}{2016}P=\)
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Cho \(P=\left(1-\frac{1}{1+2}\right).\left(1-\frac{1}{1+2+3}\right)....\left(1-\frac{1}{1+2+...+2014}\right)\)
Khi đó \(\frac{2014}{2016}P=...\)
Cho \(P=\left(1-\frac{1}{1+2}\right).\left(1-\frac{1}{1+2+3}\right)...\left(1-\frac{1}{1+2+...+2014}\right)\)
Khi đó \(\frac{2014}{2016}P\)
P=(-2/1+2).(-2-3/1+2+3)...(-2-3-...-2014/1+2+...2014)
-P=(1.4/2.3)(2.5/3.4)...(2013.2016/2014.2015)
-P=(1.2.3...2014/2.3.4...2013)(4.5.6...2016/3.4.5...2015)
-P=(1/2014)(2016/3)
P=(-1/2014)(2016/3)
(2014/2016)P=-107/3021
Vay...
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Cho P=(1-1/1+2).(1-1/1+2+3)....(1-1/1+2+...+2014).2014/2016 P =?
Cho dãy số 2;-5;8;-11;14;...số hạng thứ 100 của dãy là
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a, x+1/2013+x+1/2014+x+1/2015=x+1/2016+x+1/2017
b,x-1/2013+x-2/2014+x-3/2015=x-4/2016-2
\(P=\left(1-\frac{1}{1+2}\right)\cdot\left(1-\frac{1}{1+2+3}\right)...\left(1-\frac{1}{1+2+3+...+2014}\right)\)Khi đó \(\frac{2014}{2016}\).P=
\(P=\left(1-\frac{1}{1+2}\right).\left(1-\frac{1}{1+2+3}\right)...\left(1-\frac{1}{1+2+3+...+2014}\right)\)Khi đó \(\frac{2014}{2016}\)P=
P=336/1007
2014/2016P=2014/2016.336/1007=1/3
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P= (1-1/1+2)(1-1/1+2+3)....(1-1/1+2+3..+2014)Tìm 2014/2016*P=
Cho A= 1/2+1/3+1/4+..+1/2016
B= 2015/1+2014/2+2013/3+....+2/2014+1/2015. Tính B/A