Question

若a,b互为相反数c、d互为倒数,m的绝对值=2求2m分之a+b+m^2-3cd的值

Answer 1

若a,b互为相反数,则a+b=0

c、d互为倒数,则cd=1

m的绝对值=2,则m²=4

2m分之a+b+m^2-3cd

=0/(2m)+4²-3*1

=16-3

=13