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Mathematics

If a2 = log x, b3 = log y and 3a2 - 2b3 = 6 log z, express y in terms of x and z.

Logarithms

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Answer

⇒ 3a2 - 2b3 = 6 log z

⇒ 3log x - 2log y = 6 log z

⇒ log x3 - log y2 = log z6

⇒ log x3y2\dfrac{x^3}{y^2} = log z6

x3y2=z6\dfrac{x^3}{y^2} = z^6

y2=x3z6y^2 = \dfrac{x^3}{z^6}

y=x3z6y = \dfrac{\sqrt{x^3}}{\sqrt{z^6}}

⇒ y = x32÷z3x^{\dfrac{3}{2}} ÷ z^3.

Hence, y=x32÷z3y = x^{\dfrac{3}{2}} ÷ z^3.

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