Question

lal/a=1则a=()0

1.当a（ ）0时,lal/a=1当a（ ）0时,lal/a=-1
2.已知a、b互为相反数c、d互为倒数,x

Answer 1

1,lal = a,a不等于0,故 a>0;
|a| = -a故a