2/1*3+2/3*5+2/5*7……+2/97*99+2/99*101
1个回答
2/n(n+2)=1/n-1/(n+2) n=1,3,5,...,99
(1-1/3)+(1/3-1/5)+...+(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)
2/1*3+2/3*5+2/5*7+..+2/99*101
2/(1*3)+2/(3*5)+2/(5*7)+2/(7*9)+.+2/(95*97)+2/(97*99)=?
简算 1*3分之2+3*5分之2+5*7分之2+...+97*99分之2+99*101分之2
100*101-99*100+98*99-97*98+96*97-95*96+.+4*5-3*4+2*3-1*2=?
2/3*5+2/5*7+2/7*9+······+2/97*99
1-2+3-4+5-6+7-……+97-98+99-100+101怎么算
1/3*2/5+1/5*2/7+ 1/7*2/9+……+1/99*2/101
2/1*3+2/3*5+2/5*7+2/7*9+……+2/97*99的简便运算