Determine o valor decimal de (0,666...).(0,666...)+(0,333...).(0,333...)
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0.666...=2/3
0.333...=1/3
(2/3)(2/3)+(1/3)(1/3)
(4/9)+(1/9)
5/9
0.555...
0.333...=1/3
(2/3)(2/3)+(1/3)(1/3)
(4/9)+(1/9)
5/9
0.555...
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