若la-1l+lb-3l=0,则ab=?

若la-1l+lb-3l=0,则ab=? 若la+2l+lb+3l=0,则3a+2b= la+3l+lb-2l+c+1l=0求a+b+c 如果la-1l=1,lb-2l=3,则a+b= 若la-5l+lb+6l=0,求-b-a-(-2/3)的值 若la-3l+lb-7l=0,求a+b+2000的值 la-1l+lb+3l=0求b-a-0.5的值 la-2l=5,lb+1l=4 且ab＜0求a+b-ab的值 若la-1/2l+lb+2l=0,则b-a-7/2的值是 已知la-4l+lb-8l=0,求a+b/ab的值 已知a,b是有理数,la-5l+lb-3l=0,求ab/a-b的值 la-1/2l+lb-1/3l+lc-1/4l=0那么a+b-c=? la-1/2l+lb-1/3l+lc-1/4l=0,求a+b+c的值. 已知la+1l+lb-2l+lc+3l=0,求lal+lbl+lcl的值 若la—1/2l+lb+2l=0,则b—a—3又1/2的值是 la+3l+lb-2l=0,求a的b次幂 已知la-3l+lb-5l=0,求5a-2b的值? la-1l+lb-2l=0,求a+b的值