Question

若a,b互为相反数,c,d互为倒数,m的绝对值=1

Answer 1

a、b互为相反数,a+b=0,

c、d互为倒数,cd=1,

|m|=1,m^2=1,

∴1/2(a+b)+m^2-cd

=0+1-1

=0.