1-1/3-1/9-1/27-1/81-1/243 - 知识问答

1-1/3-1/9-1/27-1/81-1/243-1/729=?

2个回答

1-1/3-1/9-1/27-1/81-1/243-1/729
=1-(1/3+1/9+1/27+1/81+1/243+1/729)
=1-{(1/3)*[1-(1/3)^6]/[1-(1/3)]
=1-[(728/729)/2]
=1-(364/729)
=365/729

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