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问题: 5.-1/2 1/4 -1/8 1/16 1/32 ( )

A.-1/64 B.1/64 c.1/12 D.1/128

答案步骤~

解答:

-1/2 1/4 -1/8 1/16 1/32(?-1/32)
-1/2×(-1/2)=1/4
1/4×(-1/2)= -1/8
-1/8×(-1/2)= 1/16
1/16 ×(-1/2)=-1/32
-1/32 ×(-1/2)=1/64
B