If \( f(x)=\frac{\sqrt{x+2}}{3-3 x^{2}} \), for which values of \( x \) is 1.2.2 \( \quad f(x) \) non real.

21. (03-2-23) \( y=\ln x \) funksiya grafigiga o'tkazilgan urinma koordinata boshidan o'tadi. Shu urinman- ing tenglamasini yozing. \( \begin{array}{lll}\text { A) } y=x & \text { B) } y=2 x & \text { C) } y=e x \\ \text { D) } y=\frac{z}{e} & \text { E) } y=3 x & \end{array} \)

a) Sketch the curve with equation \[ y=a^{-x}+4 \] where \( a \) is a constant and \( a>1 \) On your sketch show

3. (20б) Постройте область: \( \left\{\begin{array}{l}1<|z-3-i| \leq 2 \\ \arg z \geq-\frac{\pi}{6}\end{array}\right. \)

Sketch the curve with equation \[ y=a^{-x}+4 \]

Si la fonction exponentielle a une forme \( f(x) = a^x + k \), comment détermineriez-vous les caractéristiques clés si \( k < 0 \) ?