Skip to main content ☰ Contents You! < Prev ^ Up Next > \(\require{cancel}\newcommand{\dee}[1]{\mathrm{d}#1}
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Chapter 1 Limits
So very roughly speaking, “Differential Calculus” is the study of how a function changes as its input changes. The mathematical object we use to describe this is the “derivative” of a function. To properly describe what this thing is we need some machinery; in particular we need to define what we mean by “tangent” and “limit”. We'll get back to defining the derivative in Chapter
2 .
