Question

Mng ơi giúp em bài 2 ạ em cần gấp 7H

Answer 1

\(2,\\ a,=7^{5+8}=7^{13}\\ b,=5^{8-5}=5^3\\ c,=\dfrac{1}{3^2}=\dfrac{1}{9}\\ d,=\dfrac{2^9}{2^{10}}=\dfrac{1}{2}\\ e,=\dfrac{3^9}{3^{12}}=\dfrac{1}{3^3}=\dfrac{1}{27}\\ f,=\dfrac{5^6}{5^3}=5^3=125\\ g,=\dfrac{\left(2\cdot3\right)^{12}\cdot2^2}{6^{11}}=\dfrac{6^{12}\cdot2^2}{6^{11}}=6\cdot4=24\\ h,=\dfrac{2^{18}\cdot3^{18}}{3^{18}\cdot2^{15}}=2^3=8\)

Answer 2

Bài 3: 

a: \(\dfrac{4^2\cdot4^3}{2^{10}}=\dfrac{2^4\cdot2^6}{2^{10}}=1\)

b: \(\dfrac{\left(0.6\right)^5}{\left(0.2\right)^6}=\dfrac{\left(0.2\right)^5\cdot\left(0.3\right)^5}{\left(0.2\right)^5\cdot0.2}=\dfrac{243}{20000}\)