Câu hỏi:

\(x=\alpha +k4\pi ,\,\left( k\in \mathbb{Z} \right)\)

\(x=\alpha -k2\pi ,\,\left( k\in \mathbb{Z} \right)\)

\(x=\alpha +k2\pi ,\,\left( k\in \mathbb{Z} \right)\)

\(x=\alpha +k\pi ,\,\left( k\in \mathbb{Z} \right)\)

Giảm

Không bị chặn

Tăng

Bị chặn

\(\left\{ \begin{align} {{u}_{1}}=2 \\ {{u}_{n+1}}={{u}_{n}}+n \\ \end{align} \right.\)

\(\left\{ \begin{align} {{u}_{1}}=-1 \\ {{u}_{n+1}}-{{u}_{n}}=2 \\ \end{align} \right.\)

\(\left\{ \begin{align} {{u}_{1}}=3 \\ {{u}_{n+1}}=2{{u}_{n}}+1 \\ \end{align} \right.\)

\(\left\{ \begin{align} {{u}_{1}}=1 \\ {{u}_{n+1}}=u_{n}^{3}-1 \\ \end{align} \right.\)

\({{u}_{n}}={{3}^{n}}\)

\({{u}_{n}}={{3}^{n-1}}\)

\({{u}_{n}}={{3}^{n+1}}\)

\({{u}_{n}}={{n}^{n+1}}\)

\(93\)

\(-31\)

\(33\)

\(11\)

Hàm số \(y=\text{cos}x\) là hàm số chẵn

Hàm số \(y=\text{sin}x\) là hàm số chẵn

Hàm số \(y=\text{cot}x\) là hàm số chẵn

Hàm số \(y=\text{tan}x\) là hàm số chẵn

\(\left( \frac{\pi }{2};\pi \right)\)

\(\left( 0;\pi \right)\)

\(\left( -\pi ;0 \right)\)

\(\left( \frac{-\pi }{2};\frac{\pi }{2} \right)\)

\(1\)

\(4\)

\(6\)

\(3\)

\({{M}_{e}}=\frac{907}{10}\).

\({{M}_{e}}=\frac{1\,123}{10}\).

\({{M}_{e}}=\frac{1\,087}{10}\).

\({{M}_{e}}=\frac{997}{10}\).

\(S=\left\{ k\pi ;\,\frac{5\pi }{12}+\frac{k\pi }{2}\,\text{ }\!\!|\!\!\text{ }\,k\in \mathbb{Z} \right\}\)

\(S=\left\{ k{{180}^{\circ }};\,{{75}^{\circ }}+k{{90}^{\circ }}\,|\,k\in \mathbb{Z} \right\}\)

\(S=\left\{ \frac{\pi }{2}+k\pi ;\,\frac{\pi }{6}+\frac{k\pi }{2}\,\text{ }\!\!|\!\!\text{ }\,k\in \mathbb{Z} \right\}\)

\(S=\left\{ {{100}^{\circ }}+k{{180}^{\circ }};\,{{30}^{\circ }}+k{{90}^{\circ }}\,|\,k\in \mathbb{Z} \right\}\)