算一算,找规律.1/2+1/4+1/8= 1/2+1/4+1/8+1/16=

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算一算,找规律.1/2+1/4+1/8= 1/2+1/4+1/8+1/16=
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算一算,找规律.1/2+1/4+1/8= 1/2+1/4+1/8+1/16=
算一算,找规律.1/2+1/4+1/8= 1/2+1/4+1/8+1/16=
 

算一算,找规律.1/2+1/4+1/8= 1/2+1/4+1/8+1/16=