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已知(1-2x)7=a0+a1x+a2x2+…a7x7,那么|a1|+|a2|+...

已知(1-2x7a0+a1x+a2x2+…a7x7,那么|a1|+|a2|+…|a7|=                        (  )

A.-1                            B.1                        C.0                        D.37-1

 

D 【解析】略
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