计算:1/2+(1/4+3/4)+(1/6+3/6+5/6)+.+(1/100+3/100+5/100+.+99/100)等于多少?

问题描述:

计算:1/2+(1/4+3/4)+(1/6+3/6+5/6)+.+(1/100+3/100+5/100+.+99/100)等于多少?

1/2=1/2;
1/4+3/4=(2²)/(2×2)=2/2;
1/6+3/6+5/6=9/6=(3²)/[2×3]=3/2;
1/8+3/8+5/8+7/8=16/8=(4²)/[2×4]=4/2;
1/10+3/10+5/10+7/10+9/10=25/10=(5²)/[2×5]=5/2;
1/12+3/12+5/12+7/12+9/12+11/12=36/12=(6²)/[2×6]=6/6;
1/14+3/14+5/14+7/14+9/13+11/14+13/14=47/14=(7²)/[2×7]=7/2;
1/16+3/16+5/16+7/16+9/16+11/16+13/16+15/16=64/16=(8²)/[2×8]=8/2;
……
这样你可明白?答案:1275/2.