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0.9*0.9*0.9*0.9*0.9*0.9*0.9*0.9*0.9*0.9*循环0.9等于?0.1*0.1*0.1*0.1*0.1*0.1*0.1*0.1*0.1*0.1*循环0.1等于?
题目详情
0.9*0.9*0.9*0.9*0.9*0.9*0.9*0.9*0.9*0.9*循环0.9等于?
0.1*0.1*0.1*0.1*0.1*0.1*0.1*0.1*0.1*0.1*循环0.1等于?
0.1*0.1*0.1*0.1*0.1*0.1*0.1*0.1*0.1*0.1*循环0.1等于?
▼优质解答
答案和解析
> >0.999999.= 0.9+0.09+0.009+0.0009...>=0.9 + 0.9/10 +0.9/100+0.9/1000.>=0.9 + 0.9/10 +0.9/10^2+0.9/10^3+0.9/10^4.>=0.9(1+ (1/10) + (1/10)^2 +(1/10)^3 + (1/10)^4 +...+(1/10)^n) > >1+x+x^2+x^3+.+x^n+.当0=0.9(1/0.9) = 1
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