2014 (2015-37) -1007 (-76+4030)
=2014 x 1978 - 1007 x 3954
=3983692 - 3981678
=2014
-> Kết quả bằng : 2014
2014 (2015 - 37) - 1007 (-76 + 4030)
= 2014.1978 - 1007.3954
= 3983692 - 3981678
= 2014 (cách này hơi dài dòng nên bn thông cảm nha) ^.^
Tính giá trị biểu thức sau:
A = 2014.( 2015 37 ) - 1007.( - 76 + 4030 )
a=2014*(2015-37)-1007*(-76+4030)
b=(1/3-1)*(1/6-1)*(1/10-1*....*(1/1275)
c = 2^19*27^3-15*4^9*9^4
tính
(1001/1007-2009/2015)x(1002/1008-2009/2015)x.....x(2014/2020-2009/2015)x(2015/2021-2009/2015)=
Tìm x biết:
\(\left(1+\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2015}\right)x+2015=\frac{2016}{1}+\frac{2017}{2}+...+\frac{4029}{2014}+\frac{4030}{2015}\)
4+2/1007-4/2015+1/504-4/2017
1/288-7/2017+7/2014-7/2015+7
tìm x biết \(\left(1+\frac{1}{2}+\frac{1}{3}+.....+\frac{1}{2015}\right)\times x+2015=\frac{2016}{1}+\frac{2017}{2}+.....+\frac{4029}{2014}+\frac{4030}{2015}\)
Tìm x biết: x-1/2015 + x/2014 + 1/503 = x-3/2013 + x/2012 + 1/1007
Cho S= 1/22+1/52+...+1/20152
Chứng tỏ 1007/2016<S< 2014/2015
Tìm x biết \(\left(1+\frac{1}{2}+\frac{1}{3}+...+\frac{1}{2015}\right)\). x + 2015 = \(\frac{2016}{1}+\frac{2017}{2}+...\frac{4029}{2014}+\frac{4030}{2015}\)
