17 Given the function f() = x4 - x2 + 2, which of the following statements is true about f (a)? Select one alternative: Of(x) is decreasing on (0, 1) and (1, 00). Of(x) is increasing on (-co, -1) and (1, 00). Of(x) is increasing on (-1, 0) and (0, 1). Of(x) is decreasing on (-co, -1) and (0, 1). 18 Given the function f(I) = I* - 213, which of the following statements is true about the point (0, 0) ? Select one alternative: O A local maximum but not an inflection point. O Neither a critical point nor an inflection point. O A local minimum but not an inflection point. O Both a critical point and an inflection point. 19 Which of the following is the derivative of (sin(2x) + 1) 10 Select one alternative: O 10(sin(2x) + 1)9 O 20 cos(2:z) (sin(2:) + 1)9 O 10 cos(2r) (sin(2z) + 1) O -20 cos(2z) (sin(21) + 1)9 20 If f is a differentiable function defined for all real numbers and g() = cos(f(I)), which of the following is the derivative of g(x) ? Select one alternative: Og(z) = f(z) cos(f'(z)) Og(z) = -f'(z) sin(f(z)) of(z) = f'(z) cos(f(z)) og(z) = -f'(z) sin(f'(z))