Question

prove that (a+b)^-1 (a^-1+b^-1)=1/ab​

Answer 1

Answer:{(a+b) -1} (a-1+b-1) =(ab) -1(a-1+b-1) (a-1+b-1) =ab -1(a-1+b-1) =ab-1(ab) -1=ab-1 ( by taking -1 common in LHS) hence prooved. hope it will help... ... Mor