Question

已知a,b互为相反数,则a方-ab分之b+b方-ab分之a的值是多少

Answer 1

a,b互为相反数

a+b=0

b/(a^2-ab)+a/(b^2-ab)

=b/(a^2-ab)+a/(a^2-ab)

=(a+b)/(a^2-ab)

=0