Question

a^−1 + b^−1 ÷ (ab)^−1​

Answer 1

Answer:

a+b

Step-by-step explanation:

$==: a^{-1} + b^{-1} / ab^{-1}\\\\==: \frac{1}{a} + \frac{1}{b} /\frac{1}{ab} \\==: \frac{a+b}{ab} / \frac{1}{ab}\\==: \frac{a+b}{ab} * ab\\\\==: a+b$