chứng minh rằng 4^3 * 32^5 - 8^8 chia hết cho 5
Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
5) 413+325-88 =(22)13+(25)5-(23)8 =226+225-224 =224(22+2-1) =224.5 chia hết cho 5
6) \(2006^{1000}+2006^{999}=2006^{999}.\left(2006+1\right)=2006^{999}.2007\) chia hêt cho 2007
5) \(4^{13}+32^5-8^8=2^{26}+2^{25}-2^{24}=2^{24}.4+2^{24}.2-2^{24}.1=2^{24}.\left(4+2-1\right)=2^{24}.5\)
6) \(2006^{1000}+2006^{999}=2006^{999}.2006+2006^{999}.1=2006^{999}\left(2006+1\right)=2006^{999}.2007\)
a) \(2010^{100}+2010^{99}\)
\(=2010^{99}\left(2010+1\right)\)
\(=2010^{99}.2011⋮2011\left(dpcm\right)\)
b) \(3^{1994}+3^{1993}-3^{1992}\)
\(=3^{1992}\left(3^2+3-1\right)\)
\(=3^{1992}.11⋮11\left(dpcm\right)\)
c) \(4^{13}+32^5-8^8\)
\(=\left(2^2\right)^{13}+\left(2^5\right)^5-\left(2^3\right)^8\)
\(=2^{26}+2^{25}-2^{24}\)
\(=2^{24}\left(2^2+2-1\right)\)
\(=2^{24}.5⋮5\left(dpcm\right)\)
b: \(8^{10}-8^9-8^8=8^8\left(8^2-8-1\right)=8^8\cdot55⋮55\)
c: 5^5-5^4+5^3
=5^3(5^2-5+1)
=5^3*21 chia hết cho 7
e:
72^63=(3^2*2^3)^63=3^126*2^189
\(24^{54}\cdot54^{24}\cdot10^2=2^{162}\cdot3^{54}\cdot3^{72}\cdot2^{24}\cdot2^2\cdot5^2\)
\(=2^{188}\cdot3^{136}\cdot5^2\) chia hết cho 3^126*2^189
=>ĐPCM
g: \(=\left(3^4\right)^7-\left(3^3\right)^9-3^{26}\)
\(=3^{26}\left(3^2-3-1\right)=5\cdot3^{26}=5\cdot9\cdot3^{24}⋮5\cdot9=45\)
a.
\(\left(0,25\right)^3\times32\)
\(=\left(0,25\right)^3\times2^5\)
\(=\left(0,25\right)^3\times2^3\times2^2\)
\(=\left(0,25\times2\right)^3\times4\)
\(=\left(0,5\right)^3\times4\)
\(=0,125\times4\)
\(=0,5\)
b.
\(\left(-0,125\right)^3\times80^4\)
\(=\left(-0,125\right)^3\times80^3\times80\)
\(=\left(-0,125\times80\right)^3\times80\)
\(=\left(-10\right)^3\times80\)
\(=-1000\times80\)
\(=-80000\)
c.
\(3^{1994}+3^{1993}-3^{1992}\)
\(=3^{1992}\times\left(3^2+3-1\right)\)
\(=3^{1992}\times\left(9+3-1\right)\)
\(=3^{1992}\times11\)
\(\Rightarrow3^{1994}+3^{1993}-3^{1992}⋮11\)
d.
\(4^{13}+32^5-8^8\)
\(=\left(2^2\right)^{13}+\left(2^5\right)^5-\left(2^3\right)^8\)
\(=2^{26}+2^{25}-2^{24}\)
\(=2^{24}\times\left(2^2+2-1\right)\)
\(=2^{24}\times\left(4+2-1\right)\)
\(=2^{24}\times5\)
\(\Rightarrow4^{13}+32^5-8^8⋮5\)
Chúc bạn học tốt
4^3 * 32^5 - 8^8 k chia hết cho 5