# Algebra

Please express in terms of sums and differences in logarithms.

log a x^3 y^2 z

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1. Add the logs of every term in the product. For the x^3 term, you get 3logx. You do the rest. Let us know if you want your answer checked

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2. 1 log a 3log x 2log y 1 logz Is this correct?

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3. No. You have to add the logs of each term. Remember that
log (abc) = log a + log b + log c etc.

log (a x^3 y^2 z) = log a + 3 log x + 2 log y + log z

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4. Please express in terms of sums and differences in logarithms.

log a x^3 y^2 z

For log_a (x^3) we can use the rule

log_b (m^n) = nlog_b (x).

The log_a (x^3) becomes 3xlog_a (x).

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We usethe same rule for y^2.

y^2 becomes 2log_y.

And finally, z becomes log_z.

We now use the sum rule:

log_b(mn) = log_b(m) + log_b(n).

3log_a(x) + 2log_y + log_z

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