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解:原式×(1-1/2)
=(1-1/2)(1+1/2)(1+1/4)(1+1/16)(1+1/256)
=(1-1/4)(1+1/4)(1+1/16)(1+1/256)=(1-1/256)(1+1/256)=1/65536
原式=(1/65536 )/(1-1/2)
=1/32768
haoping o qin ...xx好评哦亲,,谢谢啦