Question

27<3ⁿ<3.81

tìm n

Answer 1

help tui

Answer 2

\(27< 3^n< 3\cdot81\)

\(\Rightarrow3^3< 3^n< 3\cdot3^4\)

\(\Rightarrow3^3< 3^n< 3^5\)

\(\Rightarrow3< n< 5\)

\(\Rightarrow n=4\) (với \(3^n\in N^+\))

Answer 3

=>3³<3ⁿ<3¹.3⁴

=>3³<3ⁿ<3⁵

=>n = 4