# How do you solve #lnx=7.25#?

##### 2 Answers

#### Explanation:

Remember from basic definitions

Therefore if

then

(using a calculator we can find the approximation

#### Explanation:

You can only use the fact that the logarithm and the exponential are one the inverse function of the other. This means that

Using this property, you can put both left and right member at the exponent:

But we have just observed that

This, of course, assuming that by "log" you meant the natural one. If, for example, you use base 10 logarithm, you should change