Question

viết dưới dạng số lũy thừa vs số mũ khác 1

a, -8/27

b, 81/625

c, 27.81

d, 2/5. 8/125.16/625

Answer 1

a, \(-\dfrac{8}{27}=\left(-\dfrac{2}{3}\right)^3\)

b, \(\dfrac{81}{625}=\left(\dfrac{3}{5}\right)^4\)

c, \(27\cdot81=3^3\cdot3^4=3^7\)

d, \(\dfrac{2}{5}\cdot\dfrac{8}{125}\cdot\dfrac{16}{625}=\dfrac{2\cdot2^3\cdot2^4}{5\cdot5^3\cdot5^4}=\left(\dfrac{2}{5}\right)^8\)

Answer 2

a: =(-2/3)^3

b: =(3/5)^4

c: =3^3*3^4=3^7

d: =2/5*(2/5)^3*(2/5)^4=(2/5)^8