Log Number

Algebra Level 2

Suppose a real number AA satisfy the inequality 821<A<822 8^{21} < A < 8^{22} and log⁡2A \log _{ 2 }{ A } is an even number, find the value of log⁡4A \log _{ 4 }{ A } .

Image Credit: Flickr Dominic Alves.
Horace Pang by Horace Pang
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