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1.
a) \(3^4\times3^5\times3^6=3^{4+5+6}=3^{15}\)
b) \(5^2\times5^4\times5^5\times25=5^2\times5^4\times5^5\times5^2=5^{2+4+5+2}=5^{13}\)
c) \(10^8\div10^3=10^{8-3}=10^5\)
d) \(a^7\div a^2=a^{7-2}=a^5\)
2.
\(987=900+80+7\\ =9\times100+8\times10+7\\ =9\times10^2+8\times10^1+7\times10^0\)
\(2021=2000+20+1\\ =2\times1000+2\times10+1\times1\\ =2\times10^3+2\times10^1+1\times10^0\)
\(abcde=a\times10000+b\times1000+c\times100+d\times10+e\times1\\ =a\times10^4+b\times10^3+c\times10^2+d\times10^1+e\times10^0\)
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Bài 1:
Sửa đề: \(4.4.16.2^4=16.16.16=16^3\)
\(6.6.2.3.6=6.6.6.6=6^4\)
Bài 2:
\(9^2.27.3^5=\left(3^2\right)^2.3^3.3^5=3^4.3^3.3^5=3^{12}\)
Sửa đề: \(2^6.b^3.b^2.b=2^6.b^6=\left(2b\right)^6\)
\(100^2.10^5.1000=\left(10^2\right)^2.10^5.10^3=10^4.10^5.10^3=10^{12}\)
Bài 3:
\(3^2.4^3-3^2+333=9.64-9+333=900\)
\(2^5.5^2-3^2-100=32.25-9-100=800-9-100=691\)
\(5^3+6^3+59=125+216+59=400\)
b1;viết cách tích sau dưới dạng lũy thừa
4.4.16.24= 4.4.4.4.4.6=45.6
6.6.2.3.6=6.6.6.6=64
b2;viết kết quả dưới dạng lũy thừa
92. 27 .35= 9.9.9.9.9.9 = 96
25.b3.b2.b= 25 .b6
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\(3^8\cdot2^7\)
\(=3^7\cdot2^7\cdot3\)
\(=\left(3\cdot2\right)^7\cdot3=6^7\cdot3\)
\(=839808\)
\(3^8\times2^7=3^7\times3\times2^7=\left(3\times2\right)^7\times3=6^7\times3\)
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x7 .x.x4 = x.x.x.x.x.x.x.x.x.x.x.x = x12
ko bt đúng hay sai nhưng ... thôi kệ !
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a) \(7^{15}\)
b)\(162^8\). 2
c)\(10^8\)
d) \(a^0\)
Xin lỗi nha mk hơi vội nên có sai thì bạn châm trc cho mk nha.
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512.7 – 511.10 = 511(5.7 – 10) = 511(35 – 10) = 511.25 = 511.52 = 513
512 . 7 - 511 . 10
= 511 . 5 . 7 - 511 . 10
= 511 . 35 - 511 . 10
= 511 . ( 35 - 10 )
= 511 . 20
= 511 . 5 . 4
= 512 . 4