Why is Demidovich so hard? There are three pedagogical reasons:
Its endurance speaks to a truth that educational fashions cannot erase: The "conceptual understanding only" movement of the late 20th century produced students who could state the Fundamental Theorem of Calculus but could not integrate $\sec^3 x$ to save their lives. Demidovich is the antidote.
we could add more!
It covers everything from basic limits and differentiation to infinite series and differential equations.
You will need these for almost every integral. Logarithm Rules: Essential for simplifying complex limits.
