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Which expression is equivalent to (x^1/2y^1/4z)^-2?

A. x^1/2/yz^2

B. x^1/2/yz^2

C. y^1/2/xz^2

D. xz^2/y^1/2

Respuesta :

Answer with explanation:

The Given Expression is

  [tex]=(x^{\frac{1}{2}}*y^\frac{1}{4}*z)^{-2}\\\\=(x^{\frac{1}{2}})^{-2}\times(y^\frac{1}{4})^{-2}\times z^{-2}\\\\=x^{\frac{-2}{2}}\times y^{\frac{-2}{4}} \times z^{-2}\\\\=x^{-1}\times y^{\frac{-1}{2}}\times z^{-2}\\\\ =\frac{ y^{\frac{-1}{2}}}{x \times z^2}[/tex]

Used following law of exponents

[tex](x^a*y^b*z^c)^m=x^{am}*y^{b m}*z^{cm}[/tex]

In option C,if we replace [tex]y^{\frac{1}{2}} {\text{by}}y^{\frac{-1}{2}}[/tex]

then Option C, will be true,otherwise none of the option is true.

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