chung minh: 24^54 x 54^24 x 2^10 chia hết 72^63
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24^54.54^24.2^10=(2^3.3)^54.(3^3.2)^24...
=(2^3)^54.3^54.(3^3)^24.2^24.2^10
= 2^162.2^24.2^10.3^54.3^72
=2^196.3^126
72^63=(2^3.3^2)^63
=(2^3)^63(.3^2)^63=2^189.3^126
vì 2^196.3^126 chia hết 2^189.3^126
=>24^54.54^24.2^10 chia hết 72^63
\(24^{54}.54^{24}.2^{10}\)
\(=\left(2^3.3\right)^{54}.\left(3^3.2\right)^{24}.2^{10}\)
\(=\left(2^3\right)^{54}.3^{54}.\left(3^3\right)^{24}.2^{24}.2^{10}\)
\(=2^{162}.3^{54}.3^{72}.2^{24}.2^{10}\)
\(=2^{196}.3^{126}\)
Lại có :
\(72^{63}=\left(2^3.3^2\right)^{63}\)
\(=\left(2^3\right)^{63}.\left(3^2\right)^{63}\)
\(=2^{189}.3^{126}\)
Vì \(2^{196}.3^{126}⋮2^{189}.3^{126}\Leftrightarrowđpcm\)
\(24^{54}.54^{24}.2^{10}\)
\(=\left(2^3.3\right)^{54}.\left(3^3.2\right)^{24}.2^{10}\)
\(=\left(2^3\right)^{54}.3^{54}.\left(3^3\right)^{24}.2^{24}.2^{10}\)
\(=2^{162}.3^{54}.3^{72}.2^{24}.2^{10}\)
\(=2^{196}.3^{126}\)
Lại có :
\(72^{63}=\left(2^3.3^2\right)^{63}\)
\(=\left(2^3\right)^{63}.\left(3^2\right)^{63}\)
\(=2^{189}.3^{126}\)
Vì \(2^{196}.3^{126}⋮2^{189}.3^{126}\)
\(\Leftrightarrowđpcm\)
24^54 x 54^24 x 2^10=(2^3.3)^5 x (3^3.2)^24...
=(2^3)^54 x 3^54 x (3^3)^24 x 2^24 x 2^10
= 2^162 x 2^24 x 2^10 x 3^54 x 3^72
=2^196 x 3^126
72^63=(2^3 x 3^2)^63
=(2^3)^63 x (3^2)^63= 2^18 x 3^126
Vì 2^196 x 3^126 chia hết 2^189 x 3^126
=>24^54 x 54^24 x 2^10 chia hết 72^63