18.4. Let f be analytic within and on a positively oriented closed contoury, and the point zo is not on y. Show that L f(z) (-20)2 dz = '(2) dz. 2-20

Determine if the statemment is true or false. If the statement is false, then correct it and make it true. If the function f increases on the interval -,x1 and decreases on the interval x1,, then fx1 is a local minimum value.

Let fx, y) = 5x + 5xy – 6y. Give the coordinates of a point on the graph of f at the point (3,6). O A. No correct Answer о в (-81,3, 6) о с (3,6, -81) OD (5,5,3) ОЕ (3,5,5) E.

2. Construct the cubic spline that intersects with function f(r) at these points (1,-5), (0, 3), (1.5,2), and use the cubic spline function to estimate f(1.2).