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basic calculus

Integral: How to weigh an elephant?

Once upon a time, during the Early Lê dynasty in Vietnam, there was a brilliant scholar named Lương Thế Vinh , renowned for his intelligence and mathematical skills. His fame spread far and wide, even… 

Introduction to Integrals (With Examples)

If derivatives are about breaking things apart to see how fast they are changing, integrals are about putting those pieces back together to see how much has accumulated. Imagine you are driving a car. Your… 

The Chain Rule Explained (With Examples)

The Power, Sum, Product, and Quotient rules give you a massive arsenal for tackling calculus problems. But eventually, you will run into a function that doesn’t fit any of those molds. What do you do… 

The Second Derivative Test Explained (With Examples)

You already know that setting the first derivative to zero helps you find critical points—the places where a function temporarily flattens out. But once you find a critical point, how do you know if it’s… 

Finding Local Optima Explained (With Examples)

Calculus isn’t just about tracking motion; it is the ultimate mathematical tool for finding the best possible outcome. Whenever a business wants to maximize its profit, an engineer wants to minimize the material used to… 

Smooth Functions Explained (With Examples)

Imagine you are designing a roller coaster. Continuity guarantees that the track is unbroken—the cart won’t fly off a cliff into thin air. But an unbroken track isn’t enough. If that continuous track suddenly takes… 

Introduction to the Derivative (With Examples)

You have mastered limits, which are the foundational tools of calculus. Now, it is time to unlock the main event: The Derivative. If limits tell us where a function is trying to go, the derivative… 

Mastering Calculus: The Squeeze Theorem Explained (With Examples)

Calculus provides plenty of algebraic tricks for evaluating limits—factoring, multiplying by conjugates, and dividing by the highest power. But eventually, you will encounter a function that completely defies algebra. It might oscillate infinitely or contain… 

What is the Constant Times Limit Rule?

What is the Constant Times Limit Rule? In plain English, the rule states that the limit of a constant multiplied by a function is equal to that constant multiplied by the limit of the function.… 

Fundamental limit rules with funny intuition

Let’s go over the fundamental limit rules (sum, difference, multiple, quotient, power) with their mathematical formulas and a funny or intuitive twist for each one. 🎯 1. Sum Rule 📏 Rule: 🤣 Funny Intuition: Limits… 

Riemann sum

A Riemann sum is a method used in calculus to approximate the integral (or area under a curve) of a function. It is named after the German mathematician Bernhard Riemann. The basic idea behind a… 

Example of using derivatives to find optimal drug dosage

Dosage Optimization: Pharmacologists use derivatives to find the optimal drug dosage that maximizes therapeutic effects while minimizing side effects. The concentration of the drug in the bloodstream is modeled as a function of time, and… 

Tricks for remembering integral rules

Understanding the relationship between derivatives and antiderivatives can significantly help in remembering and applying the rules for finding antiderivatives (also known as integrals). Here’s how this relationship aids in comprehension and recall: 1. Fundamental Theorem… 

What’s limit?

Here are a few more examples of limit computations involving various techniques: Example 1: Basic Limit Find the limit: Solution: This is a basic limit where we can directly substitute : Example 2: Limit Involving… 

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