hannamay
hannamay hannamay
  • 20-12-2018
  • Mathematics
contestada

Evaluation the expression when x=-1 and y=3.

5x^-6y^-2
—————
Y

Respuesta :

gmany
gmany gmany
  • 21-12-2018

Put the vales of x and y to the expression:

[tex]x=-1;\ y=3\\\\\dfrac{5x^{-6}y^{-2}}{y}=\dfrac{5(-1)^{-6}(3)^{-2}}{3}=\dfrac{5(-1)^6\left(\dfrac{1}{3}\right)^2}{3}=\dfrac{5(1)\left(\dfrac{1}{9}\right)}{3}=\dfrac{\dfrac{5}{9}}{3}\\\\=\dfrac{5}{9}\cdot\dfrac{1}{3}=\boxed{\dfrac{5}{27}}[/tex]

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