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# ICSE Class 9 Mathematics Revision Notes Chapter 7 - Indices (Exponents)

Last updated date: 05th Aug 2024
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## Revision Notes for ICSE Class 9 Mathematics Chapter 7 - Free PDF Download

Free PDF download of Class 9 Mathematics Chapter 7 - Indices (Exponents) Revision Notes & Short Key-notes prepared by expert Math teachers as per ICSE guidelines . To register Maths Tuitions on Vedantu.com to clear your doubts.

An exponent refers to the times a number is multiplied by itself. When an exponent is a negative number, the end product is every time a fraction. Fractions are of a numerator over a denominator. In this case, the numerator is always supposed to be 1. To find the denominator, imagine that the negative exponent is positive, and raise the number to that power. The indices of a number say how many times we can use the number in a multiplication. It’s on the right shown as a small number and above the base number.

## Chapter 7 - Indices (Exponents)

While dealing with numbers, indices have a very important role to play. The most common example of usage of indices is the description of very large numbers. Although, finite, large numbers such as the distance between galaxies would be incomprehensible if they were to be written with each and every digit. This is the part where the indices are really helpful. Not only making the numbers comprehensible, indices especially the exponents have a larger role to play while dealing with fractional and irrational numbers. With the help of indices and the law of indices many large calculations can be made within a few seconds. Therefore, the indices (exponents) chapter is of great benefit for the students and in preparing them for exams, these revision notes are of significant importance.

### Importance of Revision

The most important point for a successful revision is how sincere you’re being with yourself. That point of time may be the first time that you are sitting down and preparing your own study notes without anyone’s disturbance or anyone checking what you’re doing. Sitting and looking at your books and dreaming elsewhere doesn’t count as a revision, sitting at your desk and looking out of the window also does not count as revision, even if you are keeping your books open in front of you. You need to be honest in what you are doing. If you feel that the revision that you’re doing is actually going to bring you a good score or if it will be of some use then go ahead and practice more but if you are doing it in order to waste your time just to postpone a few tasks, then it’s of no use to sit and dream.

Sometimes you can take help from your teachers for revision notes. You can prepare your own revision notes and show them if you can rely on them.

Vedantu provides suitable notes for students to practice. Make notes and show them if it will help you in scoring well. For getting notes you can subscribe to vedantu.

Vedantu’s full notes for Class 9 Mathematics Chapter 7 Indices Revision notes are available here.

## FAQs on ICSE Class 9 Mathematics Revision Notes Chapter 7 - Indices (Exponents)

1. Is the content from Vedantu the same as that of our textbook?

Yes. The content you find in the notes is the same as the ICSE class 9 Mathematics textbook. In fact, the notes prepared are designed in the simplest way where students won’t have any difficulties in understanding. Vedantu notes are prepared by the experts after thorough research. These prepared notes will guide the students to understand all the hard portions from the chapters easily. When students don’t find time to read the textbook thoroughly they can go through these notes to make themselves clear. It can save them time.

2. What are Indices?

A variable or a number may or may not have an index (indices). Indices of a variable is a value that is raised to the power of the variable. The indices in other terms are also known as powers or exponents. It shows how many times a number has to be multiplied.

3. What is the difference between power and exponent?

In mathematical terms, power refers to the number of times a number is being multiplied by itself meaning the number of times you get raising a number to an exponent whereas if we talk about an exponent, it is the total number of times the number is used in a multiplication. Exponents are mostly known as powers or indices. In basic terms, power is an expression that represents repeated multiplication of the same number whereas exponent refers to a quantity that represents the power to which the number is raised. Both terms are often used with not much difference or change in mathematical operations.

4. How much can we rely on the Vedantu website’s notes?

Compared to YouTube videos, online sites can give much more information. You can search for what queries you have and you’ll get an answer. Choosing a reliable site is very important when making notes. Some websites give notes without research. You should know which site to visit and which site not to. Vedantu provides detailed notes which can actually provide answers to your queries where some sites might not. Always prefer a verified site like Vedantu.