解
a,b互為相反數(shù)
則a+b=0
b,c互為倒數(shù)
則bc=1
/d/=2
則d=±2
當(dāng)d=2時(shí),
-2bc+bc/(a+b+d)——這個(gè)吧
=-2×1+1/(0+2)
=-2+1/2
=-3/2
當(dāng)d=-2時(shí)
-2bc+bc/(a+b+d)
=-2×1+1/(0-2)
=-2-1/2
=-5/2