c, 10 mũ 8

25⁴.2⁸=(5²)⁴.2⁸=5⁸.2⁸=(5.2)⁸=10⁸

15⁸.9⁴=15⁸.3⁸=45⁸

c. 10 mũ 8

d. 45 mũ 8

\(4^{10}\times8^{15}\)

\(=\left(2^2\right)^{10}\times\left(2^3\right)^{15}\)

\(=2^{20}\times2^{45}\)

\(=2^{65}\)

\(4^{15}\times5^{30}\)

\(=\left(2^2\right)^{15}\times5^{30}\)

\(=2^{30}\times5^{30}\)

\(=\left(2\times5\right)^{30}\)

\(=10^{30}\)

\(27^{16}\div9^{10}\)

\(=\left(3^3\right)^{16}\div\left(3^2\right)^{10}\)

\(=3^{48}\div3^{20}\)

\(=3^{28}\)

4^10 . 8^15

= (2^2)^10 . (2^3)^15

= 2^20 . 2^45

= 2^20 + 45

= 2^65

4^15 . 5^30

= (2^2)^15 . 5^30

= 2^30 . 5^30

= 10^30

27^16 : 9^10

= (3^3)^16 : (3^2)^10

= 3^48 : 3^20

= 3^48 - 20

= 3^28

4^10 . 8^15

= ( 2^2)^10 . ( 2^3 )^15

= 2^20 . 2^45

= 2^65

4^15 . 5^30

=(2^2)^15 . 5^30

= 2^30 .  5^30

= ( 2.5 )^30

=10^30

27^16:9^10

=(3^3)^16:(3^2)10

=3^48:3^20

=3^28

k mk nha cac ban

mình cũng hỏi về cái này gấp nha ai biết trả lời câu nào thì trả

b) \(\dfrac{\left(0,8\right)^5}{\left(0,4\right)^6}\)

\(=\dfrac{\left(0,8\right)^5}{\left(0.4\right)^5\cdot0,4}\)

\(=\left(\dfrac{0,8}{0,4}\right)^5\cdot\dfrac{1}{0,4}\)

\(=2^5\cdot\dfrac{5}{2}\)

\(=\dfrac{2^5\cdot5}{2}\)

\(=2^4\cdot5\)

\(=80\)

c) \(\dfrac{2^{15}\cdot9^4}{6^6\cdot8^3}\)

\(=\dfrac{2^{15}\cdot\left(3^2\right)^4}{2^6\cdot3^6\cdot\left(2^3\right)^3}\)

\(=\dfrac{2^{15}\cdot3^8}{2^{15}\cdot3^6}\)

\(=\dfrac{3^2}{1}\)

\(=9\)

c) 2^15.9^466.83=2^15.3^8/2^6.3^6.2^9=3^2/1=9

dấu này / là phần  nha