Functions: $$f$$, $$g$$, $$y$$, $$u$$ Argument (independent variable): $$x$$ Set of natural numbers: $$\mathbb{N}$$ Set of real numbers: $$\mathbb{R}$$ The base of natural logarithms: $$e$$ Natural numbers: $$n$$ Integers: $$k$$ Real numbers: $$a$$, $$b$$, $$c$$, $$d$$ Angle: $$\alpha$$ Period of a function: $$T$$ The concept of function is one of the most important in mathematics. … Continue reading Functions and Their Graphs