Rachel M.

asked • 04/06/16

Write the quantity using sums and differences of simpler logarithmic expressions

Express the answer so that logarithms of products, quotients, and powers do not appear.
 
ln((square root of 4-x^2) / ((x-1)(x+1)^(3/2))

1 Expert Answer

By:

Rachel M.

((1/2)ln4-x^2) / (ln(x-1)+(3/2)ln(x+1))
Does that look right?
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04/07/16

Edward C.

tutor
Almost.  Remember that the logarithm of a quotient is equal to the difference of the logarithms [ln(A/B) = ln(A) - ln(B)] so there should not be a division sign in your answer, it should be a subtraction sign.  And I would distribute the negative sign to get rid of the parentheses since A - (B + C) = A - B - C.  And you can factor (4 - x^2) [it is a difference of squares] and then simplify further using ln(A*B) = ln(A) + ln(B).  
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04/07/16

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