Question

So sánh
27¹⁵  và 81¹¹

Answer 1

27^15=(3^3)^15=3^45

81^11=(3^4)^11=3^44

vì 3^45>3^44

=>27^15>81^11

Answer 2

ta có : 27¹⁵= (3³)¹⁵= 3⁴⁵

             81¹¹= (3⁴)¹¹ = 3⁴⁴

mà 45 > 44 => 3⁴⁵ > 3⁴⁴

=>  25¹⁵ > 81¹¹

Answer 3

\(27^{15}=\left(3^3\right)^{15}=3^{45}\)

\(81^{11}=\left(3^4\right)^{11}=3^{44}\)

\(\Rightarrow3^{45}>3^{44}\)

\(\Rightarrow27^{15}>81^{11}\)

Answer 4

\(27^{15}=\left(3^3\right)^{15}=3^{45}\)

\(81^{11}=\left(3^4\right)^{11}=3^{44}\)

\(\Rightarrow3^{45}>3^{44}\)

\(\Rightarrow27^{15}>81^{11}\)

Answer 5

27¹⁵  bằng |3³ }¹⁵ bằng 3⁴⁵

81¹¹ bằng |3⁴ }¹¹ bằng 3⁴⁴

vậy 27¹⁵ LỚN HƠN 81¹¹