1,0.1 ,0.01,0.001,0.0001······请用公式表达此数列,

1-0.1-0.01-0.001-.-0.000000001 1-0.1-0.01-0.001-0.0001.-0.0000000001 1除以0.1除以0.01除以0.001除以…除以0.（00…10个0）01 1-0.1-0.01-0.001-0.0001-……-0.000000001怎么算 1减0.1减0.01减0.001减0.0001 1-0.1-0.01-0.001-.-0.000000001巧算半小时内高分! 水表*1*0.1*0.01*0.001*1000*100*10 1里有几个0.1,几个0.01,几个0.001 1里面个（ ）0.01（ ）个0.001是0.1 -40,-20,-10,1,0.1,0.01,0.01,0.001,0.0001,0.00001有什么规律 0.1/0.01*0.001/0.0001 如何简便 0.1+0.01+0.001+0.0001+.=2009/() 0.1+0.01+0.001+0.0001无限循环等于多少? 我没学过极限1-0.1-0.01-0.001循环又等于多少 0.1分之1-0.01分之1-0.001分之1-0.0001分之1 1/0.1-1/0.01-1/0.001-1/0.0001.=?怎么算? 1里面有100个（）填空题：1、0.1 2、0.01 3、0.001 用数学归纳法证明0.1+0.01+0.001+.+0.1的n次方=（（1-0.1的n次方）/9） 1-0.1-0.01-0.001-0.0001用简便运算怎么算急用