Question

so sánh:

\(9^{99}\)và\(99^9\)

\(32^9\)và\(18^{13}\)

\(48^{25}\)và \(8^{51}\)

\(\left(0,3\right)^{100}\)và \(\left(0,5\right)^{201}\)

Answer 1

                                              Bài giải

Ta có : \(9^{99}=\left(9^{11}\right)^9\)

Vì \(\left(9^{11}\right)^9>99^9\text{ }\left[\left(81\cdot9^9\right)^9>99^9\right]\text{ }\Rightarrow\text{ }9^{99}>99^9\)

Answer 2

                                              Bài giải

Ta có : \(9^{99}=\left(9^{11}\right)^9\)

Vì \(\left(9^{11}\right)^9>99^9\text{ }\left[\left(81\cdot9^9\right)^9>99^9\right]\text{ }\Rightarrow\text{ }9^{99}>99^9\)