**Exponential functions**

An exponential function is the inverse of a logarithmic function. In this case, the unknown variable is the exponent. The exponential function is in the form of

where* a* is positive and different from 1. If *a* = 1, then this would be a constant function of 1.

### Solving equations

Solving equations

If we can get the same base number on both sides of the equation, then this situation is optimal for solving

If this is not possible, we then use a 10-based logarithm to help us solve the equation

In some calculators you can choose the base of the logarithm. Solving the equation is much quicker then.

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