Tính: M = [1 + (1 + 2) + (1 + 2 + 3) +…+ (1 + 2 +3 +…+ 2016)] / [2016.1 + 2015.2 + 2014.3 +…+ 2.2015 + 1.2016]

Cho M=

1+(1+2)+(1+2+3)+…+(1+2+3+…+2016)
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 2016.1+2015.2+2014.3+…+2.2015+1.2016