设A2=0.012345678987654321×(1+2+3+…+9+…+3+
题型:选择题
问题:
设A2=0.012 345 678 987 654 321×(1+2+3+…+9+…+3+2+1),B2=0.012 345 679,则9•109(1-|A|)B=( )
A.10
B.±10
C.l
D.±l
设A2=0.012 345 678 987 654 321×(1+2+3+…+9+…+3+2+1),B2=0.012 345 679,则9•109(1-|A|)B=( )
A.10
B.±10
C.l
D.±l