A.1
B.3
C.2
D.4

A.32
B.16
C.17
D.34

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B.
C.
D.

A.
B.
C.
D.

A.
B.
C.
D.

A.
B.
C.
D.

A.\(\dfrac{{f\left( {{x_1}} \right)}}{{f\left( {{x_2}} \right)}} < 1\) với mọi \({x_1},{x_2} \in \mathbb{R};\,\,{x_1} < {x_2}\).
B. \(\dfrac{{f\left( {{x_2}} \right) - f\left( {{x_1}} \right)}}{{{x_2} - {x_1}}} > 0\) với mọi \({x_1},{x_2} \in \mathbb{R}\)
C.\(f\left( {{x_1}} \right) < f\left( {{x_2}} \right)\) với mọi \({x_1},{x_2} \in \mathbb{R};\,\,{x_1} < {x_2}\).
D.\(\dfrac{{f\left( {{x_2}} \right) - f\left( {{x_1}} \right)}}{{{x_2} - {x_1}}} < 0\) với mọi \({x_1},{x_2} \in \mathbb{R};\,\,{x_1} < {x_2}\)

A.\(\left( { - \dfrac{3}{2};0} \right)\)
B.\(\left( { - 2;0} \right)\)
C.\(\left( {0; - 2} \right)\)
D.\(\left( {0;\dfrac{3}{2}} \right)\)

A.3
B.1
C.4
D.2

A.\(\dfrac{{{5^x}}}{{\ln 5}} - \dfrac{{{x^2}}}{2} + C\)
B.\({5^x} - {x^2} + C\)
C.\({5^x}\ln 2 - \dfrac{{{x^2}}}{2} + C\)
D.\(\dfrac{{{5^x}}}{{\ln 5}} - 1 + C\)