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
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.
Author: Nancy Marcus