Question

Ans the 3rd question

Answer 1

(1/3 + 1/4) ^-1
(7/12) ^-1
12/7 answer

Answer 2

______________________________
HEY, FRIEND! HERE IS YOUR ANSWER.
______________________________

$( {3}^{ - 1} + {4}^{ - 1} ) ^{ - 1} \\ = ( \frac{1}{3} + \frac{1}{4} )^{ - 1} \\ = ( \frac{7}{12} ) ^{ - 1} \\ = \frac{12}{7}$


________________________
I HOPE THAT THIS HELPS YOU.
________________________