– Four definitions of the derivative, including the symmetric derivative. The proof of d/dx (x^n) for all real n is given (using logarithms).
The Calculus 7 is no longer in print. The last print run was around 2001. After that, HarperCollins sold the rights, and newer editions (under different publishers) changed the content significantly. The only way to get the original TC7 experience is to buy a used hardcover (often priced $50–$150) or find a digital scan. the calculus 7 by louis leithold pdf
The best-known clean scan (often called the "UniMelb scan") comes from the University of Melbourne’s digitization project, but access is restricted to students. – Four definitions of the derivative, including the