1 1 1 1____+____+____=.____1*3 3*5 5*7 97*99打错了,那个等于号是加号
4个回答
原式=(1-1/3)/2+(1/3-1/5)/2+.+(1/97-1/99)/2
=(1-1/3+1/3-1/5+.+1/97-1/99)/2
=(1-1/99)/2
=44/99
相关问题
1/1*3+1/3*5+1/5*7+……+1/97*99+1/99*101
1/1*3+1/3*5+1/5*7+...1/97*99
1/1*3 + 1/3*5 + 1/5*7 + …… + 1/97*99
1/3*5+1/5*7+1/7*9+……1/97*99
1/3*5+1/5*7+1/7*9+……1/97*99
1/(1*3*5)-1/(3*5*7)-1/(5*7*9)-······-1/(95*97*99)=?
1/(1*3*5)+1/(3*5*7)+1/(5*7*9)+ …+1/(93*95*97)+1/(95*97*99)=多
1+3+5+7+……+97+99
1-3+5-7+······+97-99=
1/(1*3)+1/(3*5)+1/(5*7)+...+1/(97*99)+1/(99*101)谁帮忙解一下!