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(31A) Logarithms in base a

Evaluate.

$7^2$

Evaluate.

$\log _{3}1=$

Evaluate. Give your answers as fractions.

$2^{-5}$

Evaluate.

$\log _{9}\frac{1}{729}=$

Evaluate. Give your answers as fractions.

$343^{-\frac{1}{3}}$

Evaluate. Give your answers as fractions.

$\log_{100}\frac{1}{10}$