Overview
The application scenarios of integrals are explained in detail with examples.
» cause-effect relation in quantities.
» effect is the "aggregate" of cause
eg: displacement is "continuous-aggregate" of speed
cause-effect relation
One of the fundamental aspects of science is to measure and specify quantities. Some examples are
• length of a pen is cm
• mass of an object: gram
• temperature of water: Celsius
• the amount of time taken: seconds
• the amount of distance traveled: meter
• the speed of a car : meter per second
A pen can be used to write pages. With pens, one can write pages. Increase in the number of pen causes increase in the number of pages, which is the effect of the cause.
In this "number of pen" is a cause and "number of pages" is an effect.
This is an example of cause and effect relation.
This is a brief on "relations and functions".
Some cause-effect relations are
• Volume of Paint and painted area
• Number of tickets sold and the money collected in the sale
• speed of a car and distance covered in an hour
2 liter of paint is required to paint 3 square meter. If 14 liter paint is available, how much area can be painted?
The answer is ""
• The "volume of paint" is the cause.
• The "area painted" is the effect.
• This cause-effect relation is defined by a function involving multiplication by a constant.
.
Everyday, a hotel sends a worker to buy eggs from market. The eggs are priced at coin each and the worker charges coins for the travel to buy eggs. How many coins are to be given to buy eggs?
The answer is " coins".
• The "number of eggs" is the cause.
• The "coins" is the effect.
• This cause-effect relation is defined by a function involving addition of a constant.
A car is moving in a straight line at constant speed. It is at a distance m at sec and at a distance m at sec. The "effect" distance is given and the "cause" speed is to be computed. What is the speed?
The answer is "speed ".
• The speed is cause.
• The distance traveled is the effect.
• This cause-effect relation is defined by a function involving rate of change.
A car is moving in a straight line at constant speed. It has a velocity of m/sec for first seconds and m/sec for the next sec. What is the distance traveled in the seconds?
The answer is " "
• The speed is cause.
• The distance traveled is the effect.
• The cause-effect relation is defined by a function involving aggregate .
summary
From the examples, it is understood that, Definition of a relation as an expression involves
• addition and subtraction
• multiplication and division
• exponents and roots
Apart from these arithmetic operations, quantities may be related by "rate of change" and "aggregate ". These two topics are covered in differential and integral calculus respectively.
In the integral calculus, the "continuous aggregate" is explained.
Outline
The outline of material to learn "Integral Calculus" is as follows.
• Detailed outline of Integral Calculus
→ Application Scenario
→ Integration First Principles
→ Graphical Meaning of Integration
→ Definition of Integrals
→ Fundamental Theorem of Calculus
→ Algebra of Integrals
→ Antiderivatives: Standard results
→ Integration of Expressions
→ Integration by Substitution
→ Integration using Identities
→ Integration by Parts
→ Integration by Partial Fraction
→ Integration: Combination of Methods