1/1X2X3+1/2X3x4+…+1/48X49X50

发布时间：2021-03-16 06:15:25

1/1X2X3+1/2X3x4+…+1/48X49X50

网友回答

1/1X2X3+1/2X3x4+…+1/48X49X50
=（1/1X2-1/2X3+1/2X3-1/3x4+…+1/48X49-1/49X50）÷2
= （1/1X2-1/49X50）÷2
=（1/2-1/2450）÷2
=1224/2450÷2
=306/1225
======以下答案可供参考======
供参考答案1:
=1/2x(1/1x2-1/2x3)+1/2x(1/2x3-1/3x4)+……+1/2x(1/48x49-1/49x50)
=1/2x(1/1x2-1/2x3+1/2x3-1/3x4+……+1/48x49-1/49x50)
=1/2x(1/1x2-1/49x50)
=306/1225
以上问题属网友观点，不代表本站立场，仅供参考！