If A is an acute angle and \( tanA=\frac{5}{12}, \)the value of case A is (A) \( \frac{11}{5}\) (B) \( \frac{13}{5}\) (C) \( \frac{16}{5}\) (D) \( \frac{17}{5}\)
If \( \alpha \) and \( \beta \) are the roots of the quadratic equation \( 4{x}^{2}+2x-1=0\) then the value of \( \sum _{r=1}^{\infty }\left({\alpha }^{r}+{\beta }^{r}\right)\) is: (a) \( 2\) (b) \( 3\) (c) \( 6\) (d) \( 0\)