#1858 · Algebra · Exponentials & logarithms
Digits in integer part for .56515
How many digits are there in the integral part of the number whose logarithm is .56515?
H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. XVI. Logarithms, Examples XVI.b, No. 3 (part 4)
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Checked against the answer in H. S. Hall & S. R. Knight, Higher Algebra (1891).