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某型号的手机连续两次降价,每个售价由原来的1188元降到了680元,设平均每次降...
某型号的手机连续两次降价,每个售价由原来的1188元降到了680元,设平均每次降价的百分率为x,列出方程正确的是( )
A.680(1+x)2=1188
B.1188(1+x)2=680
C.680(1-x)2=1188
D.1188(1-x)2=680
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