find the method of solving the value of (3^-1+4^-1)^-1 / 5^-1
the answer should 60/7
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Answer:
(3^-1 + 4^-1)^-1 / 5^-1
= (1/3+1/4)^-1/(1/5)
= ((4+3)/12)^-1 / (1/5)
= (7/12)^-1 / (1/5)
= (12/7)/(1/5)
= (12*5)/7
=60/7
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