So sánh các số: \({({3 \over 4})^{\sqrt 8 }}\,;\,\,{({3 \over 4})^3}\,\)
Ta có:
\(\left\{ \matrix{
0 < {3 \over 4} < 1 \hfill \cr
\sqrt 8 < 3 \hfill \cr} \right. \Rightarrow {({3 \over 4})^{\sqrt 8 }} > {({3 \over 4})^3}\)
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