1/3 = 0.33333333333......
0.333333333.....+0.333333333....+0.333333333....=0.9999999....
即1/3+1/3+1/3=0.999999......
即1=0.9999999......
答:
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1/3 = 0.33333333333......
0.333333333.....+0.333333333....+0.333333333....=0.9999999....
即1/3+1/3+1/3=0.999999......
即1=0.9999999......
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