With the school holidays period at this moment, it is perhaps a good time to revisit some of the 'killer' topics in **O Level Math**. I will start off with revisiting** A-Math Logarithm Equations** (Why: Logarithm is a brand new concepts taught only in Sec 3 unlike some other topics which are taught fundamentally in lower Sec; being such a new concept, some students could be a little overwhelmed by what **Logarithm** is all about)

Previous posts include Solving Reader's Logarithm Equations, Top 7 Commonly Made Mistakes in Logarithms

Photo By **zebtron**

To solve logarithm equations, it is very important to be able to identify the main types of equations.

**Types of Logarithm Equations**

There are 4 main types which I have classified:

- Only Log (singing to the tune of "Only you" lalalalala.....)
- Same Log-Log
- Different Log-Log
- Clones!

**Features of each type of Log Equations**

- Only Log: Log appears once
- Log with same bases (bases are the subscript beside Log)
- Log with different bases
- Exact looking log appears more than once

**Examples** for each type as stated above:

- [pmath]log_2 \{3x+1}/{2x-7} = 3[/pmath]
- [pmath]log_3 (2x+1) - log_3 (x-7) = 2[/pmath]
- [pmath]log_4 3y - 2log_2 x = 1[/pmath]
- [pmath](log_5 x)^2 = 2log_5 x [/pmath]

In the next post, I will be showing step by step way to solve Clones! type of Logarithm Equations. Ensure you subscribe to our feed to be posted of updates.

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