#1838 · Algebra · Exponentials & logarithms

Logarithm of cube root of negative power to base a

Find the logarithm of $3 a^{- \frac{15}{2}}$ to base $a$ .

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H. S. Hall & S. R. Knight, Higher Algebra (1891) · Ch. XVI. Logarithms, Examples XVI.a, No. 6 (part 3)

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Checked against the answer in H. S. Hall & S. R. Knight, Higher Algebra (1891).