**Let a be a positive number such that a does not equal 1, let
n be a real number, and let u and v be positive real numbers.**

**Logarithmic Rule 2:**

**Problem 4: ** Calculate .

**Answer:** There is no solution.

**Solution:** There are no rules about simplifying logarithms of sums or
differences; therefore to work this problem, you must simplify 5 + 80 - 400
Since can be written *Log*(-315) , we
know that there is no solution.

You cannot take the logarithm of a negative numbers. This is like saying
that if you raise 50 to any power, there is no way you are going to get a
negative answer.

**If you would like to review another problem, click on Next Problem.**

Do you need more help? Please post your question on our S.O.S. Mathematics CyberBoard.

Contact us

Math Medics, LLC. - P.O. Box 12395 - El Paso TX 79913 - USA

users online during the last hour