Change of base formula
Logarithms · Mathematics
Study notes
Q: Evaluate log₂(100) using common logs. Simplify log₃(5) · log₅(9). Part A: log₂(100) = log₁₀(100)/log₁₀(2) = 2/0.3010 = 6.644. Part B: log₃(5) · log₅(9) = log₃(9) (chain rule) = 2, since 3² = 9.