2/1*3+2/3*5+2/5*7+..+2/99*101
2个回答
2/1*3+2/3*5+2/5*7+.+2/99*101
=1-1/3+1/3-1/5+1/5-1/7+.+1/99-1/101
=1-1/101
=100/101
相关问题
2/1*3+2/3*5+2/5*7……+2/97*99+2/99*101
2/1*3+2/3*5+2/5*7+.+2/97*99=2/99*101
1/3*2/5+1/5*2/7+ 1/7*2/9+……+1/99*2/101
1/1×3+1/3×5+1/5×7+.+1/99×101=(2/1×3+2/3×5+2/5×7+.+2/99×
2/3*5+2/5*7+2/7*9+2/9*11+...+2/99*101
-1+2-3+4-5+6-7+...-99+100-101=?
(1+3+5+7……+99+101)-(2+4+6……+98+100)
(1+3+5+7+……+99+101)-(2+4+6+……+98+100)=?
1-2+3-4+5-6+7...+99-100+101=多少
1-2+3-4+5-6+7-8+……+99-100+101