Identify base and number: Identify the base of the logarithm and the number inside the logarithm.The base of the logarithm is 3, and the number inside the logarithm is −27.
Recognize undefined result: Recognize that the logarithm of a negative number is undefined in real numbers. The logarithm function only accepts positive numbers as its input when dealing with real numbers. Since −27 is negative, log3(−27) is undefined.