31. Which one of the following is true about the graph of the function \( f(\mathrm{x})=1+\left(\frac{1}{5}\right)^{\mathrm{x}} \) ? A. It intersects the y -axis at \( (0,1) \times \). B. It is increasing on \( [0, \infty) \) C. For \( \mathrm{x}>0 \), it lies between the lines \( \mathrm{y}=1 \) and \( \mathrm{y}=2 \) D. The line \( \mathrm{y}=0 \) is its asymptote

\( \left. \begin{array} { l } { \lim _ { x \rightarrow 3 } \frac { x ^ { 2 } - 9 } { x ^ { 2 } - 5 x + 6 } } \\ { \lim _ { x \rightarrow 3 } \frac { \sqrt { x + 1 } - 2 } { x - 3 } } \\ { 2,2 / 8 } \\ { 3 _ { 2 } / 2 / 3 } \end{array} \right. \)

La ecuación de la parábola con vértice en el origen y foco en el punto \( (0,-5) \), es: a. \( x^{2}=-20 y \) \( b . x^{2}=-5 y \) \( c y^{2}=20 x \) \( v^{2}=5 v \)

69. \( \frac{x-3}{x-2}+\frac{x+1}{x+3}=\frac{2 x^{2}+x+1}{x^{2}+x-6} \) 72. Despeja

solve each of the following equation:- \( \left(\frac{1}{7}\right)^{x}=49 \)

191. La somma di due angoli alla circonferenza misura \( 130^{\circ} 18^{\prime} 24^{\prime \prime} \) e uno di essi è \( 3 / 5 \) dell'altro'. Calcola l'ampiezza dei due angoli al centro corrispondenti. \( \quad\left[97^{\circ} 43^{\prime} 48^{\prime \prime} ; 162^{\circ} 53^{\prime}\right] \)