Skip to main content
You are not a member of this wiki.
Pages and Files
Quadratic Functions and Inequalities
Indices, Surds and Exponential
Remainder and Factor Theorem
Trigo Formula Sheet
Math Dept Wiki - for Sec 3
Indices and Surds
Know what is
Know how to do
(1) Index Notation
(a) 5 x 5 x 5 = 53 is read as 5 cubed.
(b) 2 x 2 x 2 x 2 x 2 x 2 = 26 is read as 2 to the power of 6.
(c) a x a x a x … x a x a = an is read as a to the power of n.
(2) Prime Factorisation
(a) 12 = 22 x 3
(b) 252 = 22 x 32 x 7
(a) If a number or a term is expressed in the form
, we say that it's in the
The study of
indices is about the study of numbers in index form.
(b) If the power x is positive, we say that the term is expressed in
POSITIVE INDEX FORM.
(c) If the power x is negative, we say that the term is expressed in
NEGATIVE INDEX FORM.
1. Concept Mastery - recall the 8 laws of Indices
the summary of the laws of indices:
File Not Found
View the powerpoint slides to recap the laws and the proofs of the laws. Although you are not required to demonstrate the proofs, it is good to know and it's relatively easy to understand.
Indices laws and proofs.ppt
If you prefer to learn via watching a video, here is one explaining the laws:
To see how Indices can be simplified by applying the laws, view these slides:
To solve equations involving indices
(usually called exponential equations) these are some considerations to help simplify the process:
Try to change the base of both sides of the equation to the same base.
Usually a prime number base is preferred.
Compare the index of both sides to the equation.
At other times, it may be necessary to change them to the same index and compare their base instead.
View these slides to see examples of how to solve exponential equations:
Solving Exponential Equations.ppt
Video showing multiplication of surds
Slides on Surds
help on how to format text
Turn off "Getting Started"