Question

prove that a^-1÷a^-1+b^-1 + a^-1÷a^-1-b^-1 = 2b^2÷b^2-a^2​

Answer 1

Step-by-step explanation:

hope it will help you...

Answer 2

Step-by-step explanation:

give the principle of the following separating techniques:

1. fractional distillation