Bất phương trình \[{\left( {\sqrt 2 } \right)^{{x^2} - 2x}} \le {\left( {\sqrt 2 } \right)^3}\]có tập nghiệm là:

A.65021

B.65024

C.65022

D.65023

A.1

B.2

C.0

D.3

A.Vô số

B.0

C.9

D.1

A.\[\left( {0; + \infty } \right)\]

B. \[\left[ {0;2} \right]\]

C. \[\left[ {2; + \infty } \right)\]

D. \[\left[ {2; + \infty } \right) \cup \left\{ 0 \right\}\]

A.\[f\left( x \right) > 1 \Leftrightarrow {\log _9}5 + {x^2} > 0\]

B. \[f\left( x \right) > 1 \Leftrightarrow x.\ln 5 + {x^3}\ln 9 > 0\]

C. \[f\left( x \right) > 1 \Leftrightarrow x{\log _9}5 + {x^3} > 0\]

D. \[f\left( x \right) > 1 \Leftrightarrow x + {x^3}{\log _5}9 > 0\]

A.\[f\left( x \right) > 9 \Leftrightarrow x - 2 - \left( {{x^2} - 4} \right){\log _3}7 > 0\]

B. \[f\left( x \right) > 9 \Leftrightarrow \left( {x - 2} \right)\ln 3 - \left( {{x^2} - 4} \right)\ln 7 > 0\]

C. \[f\left( x \right) > 9{\rm{\;}} \Leftrightarrow \left( {x - 2} \right)\log 3 - \left( {{x^2} - 4} \right)\log 7 > 0\]

D. \[f\left( x \right) > 9 \Leftrightarrow \left( {x - 2} \right){\log _{0,2}}3 - \left( {{x^2} - 4} \right){\log _{0,2}}7 > 0\]