express lnx+3 lny−5 lnz as a single logarithm?

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I don't get the spacing or what to do with a third variable (z).

2007-09-15 06:23:45 · 2 answers · asked by Ar J 2 in Science & Mathematics ➔ Mathematics

ln (xy)=lnx+lny
ln (x^k)=k ln(x)
ln(x/y)=lnx - ln y
ln x + 3ln y - 5 ln z =ln (xy^3 / z^5)

2007-09-15 06:43:14 · answer #1 · answered by cidyah 7 · 0⤊ 0⤋

lnx+3lny-5lnz
=lnx+lny^3-lnz^5
=ln[x y^3/z^5]. ANS.

2007-09-15 06:31:14 · answer #2 · answered by Anonymous · 0⤊ 0⤋