计算!(2/61+4/61+6/61+……+60/61)-(1/61+3/61+5/61+……+59/61)
问题描述:
计算!(2/61+4/61+6/61+……+60/61)-(1/61+3/61+5/61+……+59/61)
答
计算!(2/61+4/61+6/61+……+60/61)-(1/61+3/61+5/61+……+59/61)