\(=\dfrac{1}{2}\cdot\dfrac{2}{3}\cdot...\cdot\dfrac{2010}{2011}=\dfrac{1}{2011}\)
P = 1-1/2+1/3-1/4+...+1/2011-1/2012
Q = 1/1007+1/2008+...+1/2011+1/2012
Tinh P : Q
Cac ban lam nhanh nhanh ho mih nhed mih cam on nhieu lam
Ps : trc ngay mai nha
tìm x,biet(1/2+1/3+.............+1/2012+1/2013).x=2012/1+2011/2+2010/3+......+2/2011+1/2012
1.Cho A=1/2!+2/3!+3/4!+...+2015/2016!
Chung minh :A<1
2.Cho A=8n+193/4n+3
Tim so tu nhien n de A la phan so toi gian
Cac ban nho viet ca cach lam nua
Ko can lam het dau,biet lam cau nao thi lam
Cho A= (2012/1+2011/2+2010/3+.......+1/2012)/(1/2+1/3+1/4+....+1/2013)
Tinh A
So sanh A va B biet A=2010/2011+2011/2012+2012/2010 va B=1/3+1/4+1/5+....+1/17
Tinh
D= \(\frac{\frac{1}{3}+\frac{1}{17}-\frac{1}{13}}{\frac{2}{3}+\frac{2}{17}-\frac{2}{13}}.\frac{\frac{3}{4}-\frac{3}{16}+\frac{3}{64}-\frac{3}{256}}{1-\frac{1}{4}+\frac{1}{16}-\frac{1}{64}}+\frac{5}{8}\)
Trinh bay cach lam nhe
Ko hieu vao DOC THEM
biet n! =1*2**3*...*n . tinh 1*1!+2*2!+3*3!+4*4!+5*5!=?
tinh hop ly
A=1+1/2(1+2)+1/3(1+2+3)+1/4(1+2+3+4)+...+1/16(1+2+3+...+16)
ghi ro cach lam nha
mik tick cho
p=2011*2010*2013*2014+1.ko tinh tich hay cho biet P la nguyen to hay hop so
