Increasing and decreasing sequences are important in mathematical analysis.  They help us to figure out whether a sequence converges and whether the corresponding sum converges. So, when is a...

Slope is a useful concept in algebra, calculus, and in the sciences.  It can be applied to many fields outside of STEM as well, so it helps to know about slope. So, what do you need to know...

A parameter tells us about an entire population - for example, population mean is a parameter.  However, we cannot always poll the entire population, which is where a statistic comes in. So,...

We often need to find the derivative of a square root in calculus courses.  We can calculate the derivative of a square root using the limit definition or by using a shortcut, described...

Conditional probability is a concept that helps us to apply new knowledge when we are making predictions or calculating probabilities.  It relates two events and the probability of one or both...

Perfect numbers are an interesting concept in number theory.  To understand them, we need to find the divisors of an integer, take their sum, and see how that sum compares to the integer. So,...