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The logarithmic function is not defined for zero or negative numbers.
Logarithms are the inverse of the exponential function for a positive base. Any exponent of a positive base must be positive. So the range of any exponential function is the positive real line. Consequently the domain of the the inverse function - the logarithm - is the positive real line. That is, logarithms are not defined for zero or negative numbers.
(Wait until you get to complex analysis, though!)
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What is the sign of the product of a three negative numbers?
The product of three negative numbers is negative.
What type of numbers is the sum of two negative numbers?
They will be negative numbers as for example -5+(-7) = -12
Can depth be measured in negative numbers?
No, it is measured in positive numbers but it can be represented by negative numbers.
In order from greatest to least which will go first 7 or -5?
12
When you multiply three negative numbers is the answer always negative?
Yes, the product of three negative numbers is always a negative number.
