Question

(m+n)^-1(m^-1+n^-1)=(mn)^-1

Answer 1

Answer:

(mn)^-1

Step-by-step explanation:

Answer 2

Step-by-step explanation:

(m+n)^-1(m^-1+n-1)=(mn)^-1

=(1/m+n)(1/m+1/n)=1/mn

=(1/m+n)(n+m/mn)=1/mn

=1/mn=1/mn