L24 Math 233 Lecture Notes - Lecture 17: Unit Vector, Directional Derivative, Partial Derivative
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L24 math 233 - lecture 17 - chain rule and dependency. Explanation of the chain rule for a function f of two variables composed of function r with one variable: Function of two variables goes from two dimensions to one dimension- 2 . Function r goes from one dimension to two dimensions- 2. To compute the derivative of f composed with r: (t) Find the missing components that make up the equation: )(t) and ( d dt d dt (f. X"(t) = 2 and y"(t) = 3t^2 = 3*1^2 = 3 plug in d dt. Simplifies to (x, ) y = f. Note: hypothesis that f is differentiable insures that d f(x, ) 3 * ( x x f and c. + * y (1)) (1)) (y dx y * y0 y * ( x0 + y (x0, y0) y f d. R (f dt will be sufficiently accurate to (x, ) f equal.