Logarithms (Jump to: Lecture | Video )


Let a and x be positive numbers, where a is not equal to 0. The logarithm of x with base a is written as:

This logarithm is equal to the exponent y, which makes


Generally, the logarithm of an equation is its inverse.

Figure 1.

Let's try to solve a logarithm:

Figure 2.
Figure 3.

Logarithmic equations are essentially the opposite of exponential equations:

Figure 4.

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