chứng minh rằng: 32014 - 32013 + 32012 chia hết cho 63
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Ta có: \(M=3^{2012}-3^{2011}+3^{2010}-3^{2009}\)
\(=\left(3^{2012}+3^{2010}\right)-\left(3^{2011}+3^{2009}\right)\)
\(=3^{2010}\cdot\left(3^2+1\right)-3^{2009}\left(3^2+1\right)\)
\(=\left(3^2+1\right)\cdot\left(3^{2010}-3^{2009}\right)\)
\(=10\cdot3^{2009}\cdot\left(3-1\right)⋮10\)(đpcm)
Ta có:
\(24^{54}.54^{24}.2^{10}=\left(2^3.3\right)^{54}.\left(3^3.2\right)^{24}.2^{10}\)
\(=\left(2^3\right)^{54}.3^{54}.\left(3^3\right)^{24}.2^{24}.2^{10}\)
\(=2^{162}.2^{24}.2^{10}.3^{54}.3^{72}\)
\(=2^{196}.3^{126}\)
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 \(2^{196}.3^{126}\) chia hết cho \(2^{189}.3^{126}\)
Nên: \(24^{54}.54^{24}.2^{10}\) chia hết cho \(72^{63}\)
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Chúc bạn học tốt :)
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
Nhớ Thannks nka.(5* do)
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
Ta có:
\(24^{54}.54^{24}.2^{10}=\left(2^3.3\right)^{54}.\left(3^3.2\right)^{24}.2^{10}\)
\(=\left(2^3\right)^{54}.\left(3^3.2\right)^{24}.2^{10}\)
\(=2^{162}.3^{54}.3^{72}.2^{24}.2^{10}\)
\(=2^{196}.3^{126}\) (1)
Lại có:
\(72^{63}=\left(2^3.3^2\right)^{63}=2^{189}.3^{126}\)(2)
Từ (1) và (2) ⇒ \(24^{54}.54^{24}.2^{10}⋮72^{63}\)
\(3^{2014}-3^{2013}+3^{2012}=3^{2012}\left(9-3+1\right)\)
\(=3^{2012}\cdot7=3^{2010}\cdot63⋮63\)
Dpcm
32014 - 32013 + 32012
= 32012 x 32 - 32012 x 3 + 32012 x 1
= 32012 x 9 - 32012 x 3 + 32012 x 1
= 32012 x (9 - 3 + 1)
= 32012 x 7
= 32010 x 32 x 7
= 32010 x 9 x 7
= 32010 x 63
Mà 63 \(⋮\) 63 nên 32010 x 63 \(⋮\) 63 => 32014 - 32013 + 32012 \(⋮\)63