1:C=1.5+INT(P+0.999)*0.5; 注意INT为向下取整函数2:表述并弯滑不清。3:(1):Y=(10-2.4*3)-(5-3)*(2.4-1.3)+2.4*X=0.6+2.4*X 当绝腊闹圆(x>5)时.(2):解 15=0.6+2.4*X 得 X=64:设原进货价为C,售价为P则 (P-0.92*C)/0.92C=1.1*(P-C)/C设原利润(P-C)/C=N