Question

someone plz answer this question step by step ​

Answer 1

please mark as the Brainliest answer

Answer 2

Step-by-step explanation:

• $(a {}^{ - 1} + b {}^{ - 1} ) \div ( {a}^{ - 2} - {b}^{ - 2} )$
• $= > \frac{( {a}^{ - 1} + {b}^{ - 1}) }{( {a}^{ - 1} {})^{2} - ({b}^{ - 1}) {}^{2} }$
• $= > \frac{( {a}^{ - 1} + {b}^{ - 1}) }{( {a}^{ - 1} + {b}^{ - 1})( {a}^{ - 1} - {b}^{ - 1}) }$
• $= > \frac{1}{ {a}^{ - 1} - {b}^{ - 1} }$
• $= > \frac{1}{ \frac{1}{a} - \frac{1}{b} }$
• $= > \frac{ab}{b - a}$
• Hence the required answer. I hope it will help you. Thank you