Final answer:
To simplify the expression, use logarithmic properties to reduce it to log base 9 of (a+b)
Step-by-step explanation:
To simplify the expression, we need to use logarithmic properties. The logarithm of a number raised to a power is equal to the power times the logarithm of the number. So, we have:
Log base 9 of (a+b) multiplied by log base 9 of 9 = log base 9 of (a+b) multiplied by 1 = log base 9 of (a+b).
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