Use the method of Steepest Descent to approximate minima to within 0.005 for the following functions. a.

Question:

Use the method of Steepest Descent to approximate minima to within 0.005 for the following functions.
a. g(x1, x2) = cos(x1 + x2) + sin x1 + cos x2
b. g(x1, x2) = 100(x21− x2)2 + (1 − x1)2
c. g(x1, x2, x3) = x21 + 2x22 + x23 − 2x1 x2 + 2x1 − 2.5x2 − x3 + 2
d. g(x1, x2, x3) = x41 + 2x42 + 3x43 + 1.01