Các câu hỏi tương tự
1/1+1/3+1/5+.....+1/2013+1/2015 chia cho 1/1.2015+1/3.2013+1/5.2011+....+1/2011.5+1/2013.3+1/2015.1
I = 1+1/3+1/5+......+1/2013+1/2015 chia cho 1/1.2015+1/3.2013+1/5.2011+.......+1/2011.5+1/2013.3+1/2015.1
TÝnh gi¸ trị của I
\(\dfrac{1+\dfrac{1}{3}+\dfrac{1}{5}+...+\dfrac{1}{2013}+\dfrac{1}{2015}}{\dfrac{1}{1.2015}+\dfrac{1}{3.2013}+\dfrac{1}{5+2011}+...+\dfrac{1}{2013.3}+\dfrac{1}{2015.1}}\)
giúp mk câu này nhé!
1.2015 + 2.2014 + 3.2013 +......+ 2015.1 / 1.2 + 2.3 + 3.4 +.......+ 2015.2016
ai nhanh và đúng nhất mk tk
(1/2012+1/2013-1/2014)/(5/2012+5/2013-5/2014)-(2/2103+2/2014-2/2015)/(3/2013+3/2014-3/2015)
tính nhanh
A=1+3-5+7-..........-2013+2015
B=1-2+3-4+...................2015-2016
C=1-2-3+4+5-6-6+8+...........+2013-2014-2015+2016
D=1-4+7-10+.....-2014+2017
E=1+2-3-3+5+6 -.......+2013+2014-2015-2016
F=1-2+3-4+..........+2015+2016
G=1+3-5-7+9+11.............-2013-2015
H=1-2-34+5-6-7+8+.................+1013-1014-1015+1016
1/1*3*4+1/3*5*7 +1/5*7*9 +.......1/2011*2013*2015 =?
Thực hiện phép tính :
a ) A =\(\frac{2015+2013+2011+2009+...+7+5+3+1}{2015-2013+2011-2009+...+7-5+3-1}\)
b) B = \(\frac{1+\frac{1}{3}+\frac{1}{5}+...+\frac{1}{97}+\frac{1}{99}}{\frac{1}{1.99}+\frac{1}{3.97}+\frac{1}{5.95}+...+\frac{1}{97.3}+\frac{1}{99.1}}\)
a)(-1975)+(-1974)+.........+(-1)+0+1+............+2016
b)B=\(\frac{2015+2013+2011+2009+...........+7+5+3+1}{2015-2013+2011-2009+........+7-5+3-1}\)