Laws of Logarithm
For any positive real numbers $a$, $b$ and $c$, any rational … Read
Revision Note - Math - Number and Algebra
Measurement of Sound
The relation between the loudness ($D$ dB) of a sound and the … Read
Partial Variation
If $y$ is the sum of two parts, one part varies inversely as $x… Read
Percentage Changed
- Percentage increase $=\dfrac{\mbox{New value}-\mbox{O
Profit and Loss
- Profit $=$ Selling price $-$ Cost
- Profit percentage
$= \dfr
Quadratic Formula
For quadratic equation $ax^2+bx+c=0$, where $a$, $b$ and $… Read
Remainder Theorem
- If $f(x)$ is divided by $(x-a)$, where $a$ is a real number, t
Square Numbers
The sequence of numbers $1$, $4$, $9$, $16$, $25$, $36$, $49… Read
The Sum and the Product of the Roots
For quadratic equation $ax^2+bx+c=0$, where $a$, $b$ and $… Read
Triangle Numbers
The sequence of numbers $1$, $3$, $6$, $10$, $15$, $21$, $28… Read
Vertex Form of Quadratic Function
For quadratic function $y=ax^2+bx+c$, where $a$, $b$ and $… Read