Kindergarten

▶ Jump forward to the note on application on Partial fractions for Calculus Integration.

Example

Solve:

• Factorize the dominator.

Refer to wiki: Significant figures
Refer to Khan academy: Intro to significant figures

Refer to khan academy: Convert Repeating decimal to fraction

There’re some repeating decimals or recurring decimals, it's way more easier to write down with a fraction.

Refer to khan academy: Compound inequalities

Means an inequality that combines two simple inequalities, 
and our mission is to find out the solution of the compound inequality.

Refer to Wiki: Dimensional analysis

For example, convert 60 km/h to 60000 m/h, or to 1 km/minute.
It works out many problem in physical science and engineering problems.

Refer to math is fun: Factorial !

0! = 1

It makes no sense, but it is generally agreed this result, because:

Refer to math is fun: Σ: Sigma Notation

Literally means Sum up. Pronounced Sigma.

We can do this:

And get the result:

Or do this sum:

Refer to wiki: List of mathematical symbols

For further information, review this link, or download this pdf: Guidelines for Reading Mathematics.pdf.
Notice that: Word in PARENTHESIS doesn’t have…