INTRODUCTION OF BASIC ALGEBRA


BASIC ALGEBRA

What is Algebra?

           Algebra is the branch of mathematics that uses letters in place of some unknown numbers.
You've been using algebra since your early schooling, when you learned formulas like the area of a rectangle, with width w, height h:
A = w × h
We used letters to stand for numbers. Once we knew the width and height, we could substitute them into the formula and find our area.
Another one you may have seen is the area of a circle, with radius r:
A = πr2
As soon as we know the length of the sides, we can find the area.
Literal numbers (the letters used in algebra) can either stand for variables (the value of the letter can change, like the w, h and r in the examples of the area of a rectangle and the area of a circle) or constants (where the value does not change), for example:
π (the ratio circumference/diameter of a circle, value 3.141592....)
g (the accelaration due to gravity, 9.8 m/s2),
e (which has a constant value of 2.781828...).

Why Do We Have to do This?

          Algebra is a powerful tool for problem solving in science, engineering, economics, finance, architecture, ship-building and many other day-to-day tasks.
If we didn't use letters in place of numbers (and used words instead), we would be writing many pages for each problem and it would be much more confusing.

Comments

Post a Comment

Popular posts from this blog

MATHEMATICAL ANGLES

Image
ABOUT ANGLE Angle:            In plane  geometry , an  angle  is the figure formed by two rays, called the sides of the  angle , sharing a common endpoint, called the vertex of the  angle . Types of angle:             There are six types of angles. They are, 1.Acute angle 2.Right angle 3.Obtuse angle 4.Straight angle 5.Reflex angle 6.Full rotation                
Read more

Ex.no: 1

Image
TO OPERATE/ USE VARIOUS ICT TOOLS            A Computer is a multipurpose electronic device that can receive, process and store data. They are used as tools in every part of society together with the internet. Computer nowadays are complex there are a lot of different components inside them, and they all serve different purpose. ICT Tools           Computer, laptop, Internet, Interactive, Whiteboard, Tablet PC, iPad, iPhone, Mobile Phones, Digital Cameras, Multimedia equipment’s (audio/video), Skype & Video – Conferencing. Hence it is called as ICT Tools 1) Computer           Computer is an electronic device that is designed to work with Information. The term computer is derived from the Latin term ‘computare’, this means to calculate or programmable machine. Computer can not do anything without a Program. It represents the decimal numbers through a string of binary digits. The Word ‘Computer’ usually refers to the Center Processor Unit plus Internal mem
Read more