Convert to radian measure. Leave the answer in terms of \( \pi \). \( 280^{\circ} \) \( 280^{\circ}=\square \) radians (Simplify your answer. Use integers or fractions for any numbers in the expression.)

Sketch on the same set of axes the graphs of \( f(x)=-2 x^{2}-4 x+6 \) and \( g(x)=-2 \cdot 2^{x-1}+1 \) Clearly indicate all intercepts with the axes, turning point(s) and asymptote(s).

Determinarf \( (\mathbf{t}) \)-para \( F(s)=\frac{1}{s\left(s^{2}+16\right)} \)

Identify the trace of the surface \( 3 x+2 x^{2}-z^{2}-2 y=5 \) on \( y z \)-plase \( \begin{array}{llll}\text { A. Ellipse } & \text { (B) Circle } & \text { C. Hyperbola } & \text { D. Par }\end{array} \)

What effect does multiplying the function \( f(x) = 3^x \) by -1 have on its graph? Describe any transformations.

3) Soit \( \left(v_{n}\right) \) la suite numérique définie par \( v_{n}=\frac{2-u_{n}}{1-u_{n}} \), pour tout entier naturel \( n \) a) Montrer que \( \left(v_{n}\right) \) est une suite géométrique de raison \( \frac{2}{3} \) b) Montrer que \( u_{n}=1+\frac{1}{1-\left(\frac{2}{3}\right)^{n+1}} \), pour tout entier naturel \( n \)