Question

So sánh 3⁹⁸ và 2¹⁴⁷

Answer 1

3⁹⁸ >2¹⁴⁷   

             

Answer 2

ta có:

3⁹⁸=(3x2)⁴⁹=6⁴⁹

2¹⁴⁷=(2x3)⁴⁹=6⁴⁹

vậy 3⁹⁸= 2¹⁴⁷

Answer 3

so sánh \(3^{98}\)và \(2^{147}\)

\(3^{98}=3^{2\cdot49}=\left(3^2\right)^{49}=9^{49}\)

\(2^{147}=2^{3\cdot49}=\left(2^3\right)^{49}=8^{49}\)

Ta có \(9^{49}>8^{49}\)

\(\Rightarrow3^{98}>2^{147}\)

Answer 4

Ta có: \(3^{98}=\left(3^2\right)^{49}=9^{49}\)

            \(2^{147}=\left(2^3\right)^{49}=8^{49}\)

Xét \(9^{49}\) và \(8^{49}\)có 9 > 8

=> \(9^{49}>8^{49}\) 

=> \(3^{98}>2^{147}\)

Answer 5

Ta có: \(3^{98}\)= \(\left(3^7\right)^{14}\)= \(2187^{14}\)

            \(2^{147}\)= \(\left(2^7\right)^{14}\)= \(128^{14}\)

         \(\Rightarrow3^{98}>2^{147}\left(2187>128\right)\)