\(a=4^5.9^4-2.\dfrac{6^9}{2^{10}}.3^8+6^8.20\)

Đề là như vầy đúng ko bn?

\(10^9:10000\)

\(=10^9:10^4\)

\(=10^{9-4}\)

\(=10^5\)

\(6^3\cdot2\cdot6^4\cdot3\)

\(=2^3\cdot3^3\cdot2\cdot2^4\cdot3^4\cdot3\)

\(=2^8\cdot3^8\)

\(=6^8\)

a) 100000

b) 1679616

58589824

\(\dfrac{2^7\cdot9^3}{6^5\cdot8^2}\\ =\dfrac{2^7\cdot\left(3^2\right)^3}{\left(2\cdot3\right)^5\cdot\left(2^3\right)^2}\\ =\dfrac{2^7\cdot3^6}{2^5\cdot3^5\cdot2^6}\\ =\dfrac{2^2\cdot3}{2^6}\\ =\dfrac{4\cdot3}{64}\\ =\dfrac{12}{64}\\ =\dfrac{3}{16}\)

\(\dfrac{27^4\cdot\left(-8\right)^2}{9^5\cdot6^3}=\dfrac{\left(3^3\right)^4\cdot\left(2^3\right)^2}{\left(3^2\right)^5\cdot\left(2\cdot3\right)^3}=\dfrac{3^{12}\cdot2^6}{3^{10}\cdot2^3\cdot3^3}=\dfrac{2^3}{3}=\dfrac{8}{3}\)

\(\dfrac{24^4.\left(-8\right)^2}{9^5.6^3}\)

=\(\dfrac{\left(4.6\right)^4.\left(2^3\right)^2}{\left(3^2\right)^5.6^3}\)

=\(\dfrac{4^4.6^4.2^6}{3^{10}.6^3}\)

=\(\dfrac{2^{14}.6}{3^{10}}\)

a) \(\frac{75^3.3^7}{81^4.5^6}=\frac{5^3.3^3.5^3.3^7}{\left(3^4\right)^4.5^6}=\frac{5^6.3^3.3^7}{3^{16}.5^6}=\frac{3^{10}}{3^{16}}=\frac{1}{3^6}=\frac{1}{729}\)
b) \(\frac{6^6.4^2}{3^{12}.2^8}=\frac{2^6.3^6.\left(2^2\right)^2}{3^{12}.2^8}=\frac{2^6.3^6.2^4}{3^{12}.2^8}=\frac{2^{10}.3^6}{3^{12}.2^8}=\frac{2^2.1}{3^6}=\frac{4}{729}\)
c) \(\frac{34^5.2^5}{2^{14}.17^5}=\frac{2^5.17^5.2^5}{2^{14}.17^5}=\frac{2^{10}}{2^{14}}=\frac{1}{2^4}=\frac{1}{16}\)

 1/2 x 2 mũ n cộng 4 x 2 mũ n = 9 x 2 mũ n

= 81

A=5^10 .9+5^10.7 / 5^9.2^4

A=5^10.(9+7) / 5^9.16

A=5^10.16 /5^9.16

A=5^9.5.16/5^9.16

=>A=5/1

=>A=1

B=2^10.55+2^10. 26 / 2^8 . 27

B=2^10.(55+26) / 2^8 .27

B=2^10.81 / 2^8 .27

B=2^8.2^2.81 / 2^8.27

=>B=2^2.81 / 27

=>B=4.81 / 27

=>B=4.3^3.3 / 3^3

=>B=4.3

=>B=12

Cn phần C thì....mik chưa rõ lém nhưng mak nếu ai cko mik là dzui lém òy......ủng hộ nhoa mina

6 nhaan3 băng2