Question

Find the value of { (3^-1 + 4^-1 )^-1 } / 5^-1 ​

Answer 1

Step-by-step explanation:

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Answer 2

Answer: 60/7

Step-by-step explanation:

$\frac{(3^{-1} + 4^{-1} )^{-1} }{5^{-1} }$= $\frac{(\frac{1}{3} +\frac{1}{4} )^{-1}}{\frac{1}{5} }$ = $( \frac{4 +3}{12} )^{-1} X 5$ =  $\frac{12}{7} X 5$= 60/7= 8.57