Differential Calculus Pdf: Das And Mukherjee

| Application | Typical Problem | Key Steps | |-------------|-----------------|-----------| | | Find the equation of the tangent to (y = \sqrtx) at (x = 4). | 1️⃣ Compute (y') 2️⃣ Evaluate at (x=4) 3️⃣ Use point–slope form. | | Rates of Change | A balloon rises at 5 m/s; a car moves horizontally at 20 m/s. Find the rate at which the distance between them changes when the balloon is 30 m high. | Use related‑rates: set up (s^2 = x^2 + y^2), differentiate w.r.t. time. | | Optimization | Find the dimensions of a rectangle of maximal area inscribed in a semicircle of radius (R). | Express area as a function of one variable, differentiate, set derivative = 0, check second derivative. | | Mean Value Theorem (MVT) | Verify the MVT for (f(x)=x^3-3x) on ([0,2]). | Compute (\fracf(2)-f(0)2-0), find (c) such that (f'(c)=) that slope. | | Linear Approximation | Approximate (\sqrt4.1) using (f(x)=\sqrtx) near (x=4). | (f(x)\approx f(a)+f'(a)(x-a)). | | Newton’s Method | Find a root of (x^3-2x-5=0) starting from (x_0=2). | Iterate (x_n+1=x_n-\fracf(x_n)f'(x_n)). |

Advanced Techniques: Successive differentiation, Leibnitz's theorem, and partial differentiation. Das And Mukherjee Differential Calculus Pdf