Solution
We are given the expression as 4 log 8/25 + 3 log 16/125 + log 5.
Step 1: Convert the given logarithms to base 10
We know that the common logarithm is the logarithm to the base 10, so we will convert the given logarithms to base 10.
4 log 8/25 = 4 log (8/25) / log 10 = 4 log (2^3 / 5^2) / log 10 = 4 [(3 log 2 - 2 log 5) / log 10] = 4 [0.903 - 0.602] = 1.204
3 log 16/125 = 3 log (16/125) / log 10 = 3 log (2^4 / 5^3) / log 10 = 3 [(4 log 2 - 3 log 5) / log 10] = 3 [0.602 - 0.903] = -0.903
log 5 = log 5 / log 10 = 0.699
Step 2: Substitute the values in the given expression
Now, we will substitute the values in the given expression.
4 log 8/25 + 3 log 16/125 + log 5 = 1.204 - 0.903 + 0.699 = 0.999
Step 3: Simplify the expression
We can simplify the expression as follows:
4 log 8/25 + 3 log 16/125 + log 5 = log (8/25)^4 + log (16/125)^3 + log 5 = log [(8/25)^4 (16/125)^3 5] = log 1 = 0
Final Answer
Therefore, the value of the given expression is 0.