Tính tổng S=2C 2017 0-2C 2017 1+4C 2017 2-8C 2017 3+...+2^2016C 2016 2017-2^2017C 2017 201717/27Tính tổng S=2C20170-2C20171+4C20172-8C20173+...+22016C20172016-22017C20172017 S=-1S=1S=0S=2Giải thích