0.8,0.88,0.888,0.8888.的通项公式.谢

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0.8,0.88,0.888,0.8888.的通项公式.谢

0.8,0.88,0.888,0.8888.的通项公式.谢
0.8,0.88,0.888,0.8888.的通项公式.谢

0.8,0.88,0.888,0.8888.的通项公式.谢
n=8/9[1-1/(10^n)]