Practical Session 3. Differentiation of Composite Functions

This practical class focuses on applying the chain rule to composite functions of several variables, finding derivatives of implicitly defined functions, and computing gradients and directional derivatives. The class includes theoretical review, five problem blocks with solutions, independent work, and homework. Block 1 covers the chain rule for functions with one and multiple variables. Block 2 addresses implicit differentiation, including singular points. Block 3 presents directional derivative calculations. Block 4 explores gradient properties: direction of steepest increase and maximum growth rate. Block 5 features applied problems from physics and geography. The class concludes with independent work, homework assignments, problem-solving recommendations, analysis of typical mistakes, and self-assessment questions. This material benefits students in technical and natural sciences programs studying multivariable calculus.