Question

RÚT GỌN

\(8^4:2^5\)    b)\(81^7:9^{10}\)

Answer 1

a: \(=\dfrac{2^{12}}{2^5}=2^7\)

b: \(=\dfrac{9^{14}}{9^{10}}=9^4\)

Answer 2

\(8^4=\left(2^3\right)^4=2^{12}:2^5=2^7\\ b,81^7=\left(9^2\right)^7=9^{14}:9^{10}=9^4\)

Answer 3

\(8^4:2^5=\left(2^3\right)^4:2^5=2^{12}:2^5=2^7\)

\(81^7:9^{10}=\left(9^2\right)^7:9^{10}=9^{14}:9^{10}=9^4\)

Answer 4

a) \(\dfrac{8^4}{2^5}=\dfrac{\left(2^3\right)^4}{2^5}=\dfrac{2^{12}}{2^5}=2^{12-5}=2^7\)

b) \(\dfrac{81^7}{9^{10}}=\dfrac{\left(9^2\right)^7}{9^{10}}=\dfrac{9^{14}}{9^{10}}=9^{14-10}=9^4\)