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21.

Let f(x) = x4 - 8x2 + 3. Compute the absolute maximum and absolute minimum values of f(x) on the interval [-2, 1]. O A. Maximum value = 3, Minimum value = -4 O B. Maximum value = 4, Minimum value = -13 O c. Maximum value = 3, Minimum value = -13 O D. Maximum value = 12 Minimum value = -13 O E. Maximum value = 12 Minimum value = -4 Estimate the area bounded between the x-axis, x = - 1, x = 3, and y = 3x + 1 using 2 equal rectangles and righthand endpoints. O A. 12 O B. 16 O C. 22 O D. 64 O E. 13