Question

若a－1的绝对值＋b＋3的绝对值＝0,则b－a－二分之一的值是多少大神们帮帮忙

Answer 1

|a -1| + | b +3| = 0 ==> a - 1 = 0,b + 3 = 0 ==> a = 1,b= - 3 b -a - 1/2 = -3 - 1 - 1/2 = -9/2