Question

Viết các tích sau dưới dạng lũy thừa

a) 8^4 . 16 ^ 5

b) 5^40 . 125^2 . 625 ^3

c) 27^4 . 81 ^ 10

d) 10^3 . 100^5 . 1000 ^4

Answer 1

a) \(8^4.16^5\)

\(=\left(2^3\right)^4.\left(2^4\right)^5\\ =2^{3.4}.2^{4.5}\\ =2^{12}.2^{20}\\ =2^{12+20}\\ =2^{32}\)

b) \(5^{40}.125^2.625^3\)

\(=5^{40}.\left(5^3\right)^2.\left(5^4\right)^3\)

\(=5^{40}.5^{3.2}.5^{4.3}\)

\(=5^{40}.5^6.5^{12}\)

\(=5^{40+6+12}\)

\(=5^{58}\)

c) \(27^4.81^{10}\)

\(=\left(3^3\right)^4.\left(3^4\right)^{10}\)

\(=3^{3.4}.3^{4.10}\)

​\(=3^{12}.3^{40}\)​

\(=3^{52}\)

d) \(10^3.100^5.1000^4\)

\(=10^3.\left(10^2\right)^5.\left(10^3\right)^4\)

\(=10^3.10^{2.5}.10^{3.4}\)

\(=10^3.10^{10}.10^{12}\)

\(=10^{3+10+12}\)

\(=10^{25}\)