61. If x=2, y=-3 and z= -4, evaluate (y-2)(x-2)(z - y)
A 210 B. 30 C. -30 D-210
(Nov 2013 (11)

To find the extreme values of a function f(x.y) on a curve x-x(t), y y(t), treat f as a function of the single variable t and use the chain rule to find where df/dt is zero. in any other single-variable case, the extreme values of f are then found among the values at the critical points (points where df/dt is zero or fails to exist), and endpoints of the parameter domain. find the absolute maximum and minimum values of the following function on the given curves. use the parametric equations x=2cos t, y 2 sin t functions: curves: i) the semicircle x4,y20 i) the quarter circle x2+y-4, x20, y20 b, g(x,y)=xy

Evaluate the expression for the given value of the variable. 5×(h+3) for h=7

Two variables, x and y, vary inversely, and x=12 when y=4. what is the value of y when x=3?