初一数学计算1/(1+2)+1/(2+3)+1/(3+4)+.1/(99+100)请帮助解答
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初一数学计算1/(1+2)+1/(2+3)+1/(3+4)+.1/(99+100)请帮助解答
初一数学计算1/(1+2)+1/(2+3)+1/(3+4)+.1/(99+100)请帮助解答
初一数学计算1/(1+2)+1/(2+3)+1/(3+4)+.1/(99+100)请帮助解答
1/(1+2)+1/(2+3)+1/(3+4)+.+1/(99+100)
这个式子是没法化简的
请参考:
1/(1×2)+1/(2×3)+1/(3×4)+...+1/(99×100)
=(1-1/2)+(1/2-1/3)+...+(1/99-1/100)
=1-1/100
=99/100
那个老师出的题,有答案吗?