若2.5x=1000,0.25y=1000,则-等于( )(A) (B)3 (C)- (D)-3
问题详情：若2.5x=1000,0.25y=1000,则-等于()(A) (B)3 (C)- (D)-3【回答】A解析:因为x=log2.51000,y=log0.251000,所以==log10002.5,同理=log10000.25,所以-=log10002.5-log10000.25=log100010==.故选A.知...
问题详情：若2.5x=1000,0.25y=1000,则-等于()(A) (B)3 (C)- (D)-3【回答】A解析:因为x=log2.51000,y=log0.251000,所以==log10002.5,同理=log10000.25,所以-=log10002.5-log10000.25=log100010==.故选A.知...