Page 4 of 13 · 78 explainers
Knowledge base
More explainers from the knowledge base. Each one names what you need to know first, works through the method, and says where it usually goes wrong.
Formula CalculusIntegral Formulas: The Complete TableOne short table of base cases, and a second showing what happens to each one when the input is a linear expression instead of a bare x.
Method CalculusHow to Integrate: Step by StepIntegration is mostly pattern recognition — matching the shape in front of you to a rule for reversing it, and always checking the result by differentiating back.
Concept CalculusWhat Is an Integral? A Plain ExplanationAn integral runs a rate of change backward to recover the original quantity, or adds up an infinite number of infinitely thin slices to measure an area. Both descriptions turn out to be the same idea.
Method StatisticsHow to Find Mean, Median and ModeThree short procedures. The only one with a trap is the median, and the trap is forgetting to sort.
Concept StatisticsWhat Is an Average? Three Different AnswersAn average is a single number standing in for a whole set. There are three because there are three reasonable ways to choose it.
Method GeometryHow to Use the Pythagorean TheoremThree steps, and the only decision is whether the side you want is the hypotenuse or one of the legs.