Question

C/m : 16^7 - 2^24 chia hết cho 15

Answer 1

\(16^7-2^{24}=\left(2^4\right)^7-2^{24}=2^{4.7}-2^{24}=2^{28}-2^{24}=2^{24}.2^4-2^{24}.1=2^{24}\left(2^4-1\right)=2^{24}\left(16-1\right)=15.2^{24}\)

Luôn luôn chia hết cho 15 

Answer 2

    \(16^7-2^{24}\)

\(=268435456-16777216\)

\(=251658240\)

Chia hết cho 15. 

\(251658240:15=16777216\)