simplify:(3^-1+4^-1)×(7/12)^-1 step-by-step
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Step-by-step explanation:
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Answer:
3^-1 = 1/3
4^-1 = 1/4
(7/12)^-1 = 7^-1/12^-1
= 12/7 [ 1/12 = 12-^1 ]
[ 1/12^-1 = 12^{ (-1)×(-1) }
= 12^1
=12
(3^-1+4^-1) × (7/12)^-1
=(1/3 + 1/4) × (12/7)
=(7/12) × (12/7)
=(7×12 / 12×7)
=(84/84)
=1
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