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Find the Value of a Logarithm Expression

Question 2
log216-0.5 = ?
Solution
log216-0.5 = - 0.5 log216 = - 0.5 log224 = - 0.5 × 4 log22 = - 0.5 × 4 = - 2
formulas used
(1). logabx = x logab
(2). logaa = 1