Question

A=1/2016+2/2016+3/2016+4/2016+.....+2015/2016

A=?

Answer 1

Ta có :A=\(\frac{1}{2016}+\frac{2}{2016}+...+\frac{2015}{2016}=\frac{1+2+...+2015}{2016}\)

Xét 1+2+ ... +2015 = \(\frac{2015\times2016}{2}=2031120\)---> A=\(\frac{2031120}{2016}=1007,5\)

Answer 2

=(1+2+3+...+2015)/2016=(2015.(2015+1):2)/2016=2031120/2016=2015/2

Answer 3

A=1/2016+2/2016+3/2016+4/2016+.....+2015/2016

\(A=\frac{2015}{2}\)

\(A=2015:2=1007,5\)