A logarithm is a function that determines the exponent needed to raise a specified base to obtain a given number. It represents the inverse operation of exponentiation. As an example, consider the equation log39=2. Here, the definition of the logarithm implies that 2 is the exponent to which the base 3 must be raised to get 9. Similarly, the equation 32=9 can be expressed in logarithmic form as log39=2.
log39=2⇔32=9
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