(c) $\lim_{x \rightarrow 2}\frac{xf(2) - 2f(x)}{x - 2}$ $= \lim_{x \rightarrow 2}\frac{xf(2) - 2f(2) + 2f(2) - 2f(x)}{x - 2}$ $= f(2) - 2f^{'}(2)$ $= 4 - 2 \times 4 = - 4$
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.