Question

a supra a-b+b supra b-a=??
3p supra 3p-1+1 supra 1-3p

Answer 1

 [tex](1)...\;\;\;\;\frac{a}{a-b}+\frac{b}{b-a}=\frac{a}{a-b}+\frac{b}{-(a-b)}=\frac{a}{a-b}-\frac{b}{a-b}=\frac{a-b}{a-b}=1\;;\\ \\ (2)...\;\;\;\;\frac{3p}{3p-1}+\frac{1}{1-3p}=\frac{3p}{3p-1}-\frac{1}{3p-1}=\frac{3p-1}{3p-1}=1\;;[/tex]