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Question

If a2=log x, b3=log y and 3a22b3=6 log z, express y in terms of x and z.

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Solution

a squared=log x,b cubed=log y and 3a squared-2b cubed=6 log z
3a squared-2b cubed=6 log z
=3logx-2logy=6logz
=logx cubed-logy squared=logz to the power of 6
=logopen square brackets x cubed over y squared close square brackets=logz to the power of 6
x cubed over y squared=z to the power of 6
y squared=x cubed over z to the power of 6
y=open square brackets x to the power of begin display style 3 over 2 end style end exponent over z to the power of begin display style 6 over 2 end style end exponent close square brackets
y=x to the power of begin display style 3 over 2 end style end exponent over z cubed

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