A=1^2-2^2+3^2-4^2+...+2015^2-2016^2+2017^2
A=2017^2-2016^2+2015^2-2014^2+...+5^2-4^2+3^2-2^2+1^2
A=(2017-2016)(2017+2016)+(2015-2014)(2015+2014)+...+(5-4)(5+4)+(3-2)(3+2)+1
A=2017+2016+2015+2014+...+5+4+3+2+1
A=(2017+1).2017:2
A=2018.2017:2
A=1009.2017=2035153
a) x+2/x-2-1/x=2/x*(x-2)
b)2/2x-6+2/2x+2+2x/(x+1)*(3-x)=0
c) x+1/2017+x+2/2016=x+3/2015+x+4/2014
d) x-45/5+x-44/6+x-43/7+x-42/8=4
e) x-3/2011+x+2/2012=x-2012/2+x-2011/3
tính giá trị biểu thức
M= \(1^2-2^2+3^2-4^2+.......-2016^2+2017^2\)
\(\dfrac{x+1}{2015}+\dfrac{x+2}{2016}=\dfrac{x+3}{2017}+\dfrac{x+4}{2018}\)
Tính:
A=(1/1009+1/1010+...+1/2016+1/2017):(1-1/2+1/3-1/4+...+1/2018-1/2016+1/2017)
Giá trị biểu thức M = 12 - 22 + 32 - 42 ... - 20162 + 20172
Giá trị của biểu thức M = 12 - 22 + 32 -42 +... - 20162 + 20172 là mấy
Tìm x biết\(\frac{x-1}{2017}\)+\(\frac{x-2}{2016}\)+\(\frac{x-3}{2015}\)+....+\(\frac{x-2017}{1}\)=2017
Tìm x biết \(\frac{x-1}{2017}\)+\(\frac{x-2}{2016}\)+\(\frac{x-3}{2015}\)+....+\(\frac{x+2017}{1}\)=2017
Given P(x) = (x2 - 1/2 x - 1/2)1008
If P(x) = a2016x2016 + a2015x2015 + ..... + a1x + a0
then the value of the sum a0 + a2 + a4 + .... + a2014 is ...........
