Common Logarithm/Examples/23.6
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Example of Common Logarithm
The common logarithm of $23 \cdotp 6$ is:
- $\log_{10} 23 \cdotp 6 = 1 \cdotp 3729$
Proof
\(\ds 23 \cdotp 6\) | \(=\) | \(\ds 2 \cdotp 36 \times 10^1\) | using scientific notation | |||||||||||
\(\ds \leadsto \ \ \) | \(\ds \log_{10} 23 \cdotp 6\) | \(=\) | \(\ds \map {\log_{10} } {2 \cdotp 36 \times 10^1}\) | |||||||||||
\(\ds \) | \(=\) | \(\ds \log_{10} 2 \cdotp 36 + \log_{10} 10^1\) | Logarithm of Product | |||||||||||
\(\ds \) | \(=\) | \(\ds 0 \cdotp 3729 + 1\) | Common Logarithm of $2 \cdotp 36$, Definition of Common Logarithm | |||||||||||
\(\ds \) | \(=\) | \(\ds 1 \cdotp 3729\) |
$\blacksquare$
Sources
- 1972: Murray R. Spiegel and R.W. Boxer: Theory and Problems of Statistics (SI ed.) ... (previous) ... (next): Chapter $1$: Logarithms: Example 2.