So sánh \(\dfrac{2010}{2011}+\dfrac{2011}{2012}+\dfrac{2012}{2013}+\dfrac{671}{670}\) với 4
Giúp vs ạ!!
Tìm x biết: (1/2+1/3+1/4+...+1/2014).x =2013/1+2012/2+2011/3+...+2/2012+1/2013
Rút gọn A=\(\dfrac{\dfrac{1}{2}+\dfrac{1}{3}+\dfrac{1}{4}+...+\dfrac{1}{2013}}{2012+\dfrac{2012}{2}+\dfrac{2011}{3}+...+\dfrac{1}{2013}}\)
x-1/2014+x-2/2013=x-3/2012+x-4/2011
Cho A= 1 + \(\frac{1}{2}+\frac{1}{3}+\frac{1}{4}+...+\frac{1}{2011}+\frac{1}{2012}\)
Tìm dư khi chia số A cho 2013.
Chứng minh rằng
M=20112007+20112008+20112009+20112010+20112011+20112012 chia hết cho 2012
x-1/2016+x-2/2015+x-3/2014=x-4/2013+x-5/2012+x-6/2011
tìm x biết:
a, | x-2011| = x - 2012
b, | x-2010| + | x-2011| = 2012
So sánh S và P biết:
S=\(1-\dfrac{1}{2}+\dfrac{1}{3}-\dfrac{1}{4}+...+\dfrac{1}{2011}-\dfrac{1}{2012}+\dfrac{1}{2013}\)
P=\(\dfrac{1}{1007}+\dfrac{1}{1008}+...+\dfrac{1}{2012}+\dfrac{1}{2013}\)
