一道简便运算的数学题1/3+1/9+1/35+1/63+1/99
问题描述：
一道简便运算的数学题
1/3+1/9+1/35+1/63+1/99
答
要简便过程吗？
答
=1/3+1/9+1/(5*7)+1/(7*9)+1/(9*11)
=4/9+1/2*[1/5-1/7+1/7-1/9+1/9-1/11]
=4/9+3/55
=247/495
我只能做成这样了～～～
答
1/3+1/9+1/35+1/63+1/99
=1/3+1/9+1/(5*7)+1/(7*9)+1/(9*11)
=4/9+1/2*[1/5-1/7+1/7-1/9+1/9-1/11]
=4/9+3/55
=247/495 或
=1/3+1/9+1/(5*7)+1/(7*9)+1/(9*11)
=4/9+1/2*[1/5-1/7+1/7-1/9+1/9-1/11]
=4/9+3/55
=247/495
我只能做成这样了～～～
答
247/495
答
1/3+1/9+1/35+1/63+1/99
=1/3+1/9+1/(5*7)+1/(7*9)+1/(9*11)
=4/9+1/2*[1/5-1/7+1/7-1/9+1/9-1/11]
=4/9+3/55
=247/495