Question

$( {3}^{ - 1} + {5}^{ - 1}) \{2}^{ - 1}$
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Answer 1

(1/3+1/5)*1/2 faca mmc
(10/30+6/30)*1/2
(16/30)*1/2 simplifica 16/30 que dará 8/15
(8/15)*1/2
8/30
4/15