9) Let f (x) = xV4 - x2. Use calculus and algebra to identify the absolute minimum of f on the interval [-2, -1]. Also identify where this absolute minimum is located. Show all work clearly and give exact values, not decimal approximations. [You can use Desmos to check your answers, but not as justification for your answers. Notice Desmos gives decimal approximations, not exact answers.] Be sure to answer: f has an absolute minimum of at 10) Evaluate algebraically (meaning do not justify with numerical or graphical approximations) showing all work clearly. Be sure to use proper notation. lim a sin(ax) where a, b > 0. X+0 b tan(bx)