Question

BT2;Viết kết quả dưới dạng 1 lũy thừa;

a,125⁵:25³

b,27⁶:9³

c,4²⁰:2¹⁵

d,24³:2⁴

e,64⁴.16⁵

g,32⁴:8⁶

Answer 1

a) Ta có: \(125^5:25^3\)

\(=\frac{\left(5^3\right)^5}{\left(5^2\right)^3}=\frac{5^{15}}{5^6}=5^9\)

b) Ta có: \(27^6:9^3\)

\(=\frac{\left(3^3\right)^6}{\left(3^2\right)^3}=\frac{3^{18}}{3^6}=3^{12}\)

c) Ta có: \(4^{20}:2^{15}\)

\(=\frac{\left(2^2\right)^{20}}{2^{15}}=\frac{2^{40}}{2^{15}}=2^{25}\)

e) Ta có: \(64^4\cdot16^5\)

\(=\left(4^3\right)^4\cdot\left(4^2\right)^5\)

\(=4^{12}\cdot4^{10}=4^{22}\)

g) Ta có: \(32^4:8^6\)

\(=\frac{\left(2^5\right)^4}{\left(2^3\right)^6}=\frac{2^{20}}{2^{18}}=2^2\)

Answer 2

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