# Math 2

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Last one I promise. I'm having trouble with these.

Express in terms of logarithms of x, y, z, or w.

ln 4th root (x^6/(y^2 z))

Write the expression as one logarithm.

ln y^4 + (1/3) ln(x^9 y^9) − 7 ln y

• Math 2 -

ln 4th root (x^6/(y^2 z))
ln (x^6/(y^2z)^(1/4)

= (1/4) ( ln x^6 - ln y^2 - ln z)
= (1/4)( 6lny - 2lny - lnz)
= (3/2)lny - (1/2)lny - (1/4) lnz

ln y^4 + (1/3) ln(x^9 y^9) − 7 ln y
= ln y^4 + ln(x^9 y^9)^3 - ln y^7
= ln [y^4(x^3 y^3)/y^7]
= ln (x^3) or 3lnx

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