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donatbarto
@donatbarto
July 2022
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Если lg2=a, lg3=b, найти lg15
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helenaal
Verified answer
Дано:
lg 2 = a
lg 3 = b
Найти
:
lg 15
lg15 = lg(3*5) = lg3+lg5 = lg3 + lg(10/2) = lg3 + lg10 - lg2 = b + 1 - a = (b-a)+1
Ответ
:
(b-а)+1
6 votes
Thanks 3
donatbarto
Спасибо!!!
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Answers & Comments
Verified answer
Дано: lg 2 = alg 3 = b
Найти: lg 15
lg15 = lg(3*5) = lg3+lg5 = lg3 + lg(10/2) = lg3 + lg10 - lg2 = b + 1 - a = (b-a)+1
Ответ: (b-а)+1