已知有理数a.b.c满足abc不等于零,求a的绝对值分之a加b的绝对值分之b加c的绝对值分之c的值

a,b,c全为正数时,a/∣a∣+b/∣b∣+c/∣c∣=1+1+1=3a,b,c全为负数时,a/∣a∣+b/∣b∣+c/∣c∣=-1+（-1）+（-1）=-3a,b,c中,2个正数时,a/∣a∣+b/∣b∣+c/∣c∣=1+1+(-1)=1a,b,c中,1个正数时,a/∣a∣+b/∣b∣+c/∣c∣=...