1 × 2 / 1 + 2 × 4 / 1 + 4 × 6 / 1...+ 2010 × 2012 / 1 은 얼마 입 니까?

1 × 2 / 1 + 2 × 4 / 1 + 4 × 6 / 1...+ 2010 × 2012 / 1 은 얼마 입 니까?

1 × 2 / 1 + 2 × 4 / 1 + 4 × 6 / 1...+ 2010 × 2012 / 1 = 2 / 1 * (1 - 2 / 1) + 2 / 1 * (2 / 1 - 4 / 1) +. 2 / 18 (2010 / 1 - 2012 / 1) = 2 / 1 * (1 - 2 / 1 + 2 / 1 + 1 + 1 + + 2010 - 2012 / 1) = 2 / 1 * (1 * 2 / 1 * 2012 / 2011 = 4024 / 2011