If x-2 and y-4- then x y x-y-y x y-x-a 4b 8c 12d 2

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Absolute Value Function

If x=2 and y=...

Question

If x = 2 and y = 4, then ${(\frac{x}{y})}^{x - y} + {(\frac{y}{x})}^{y - x} =$

(a) 4

(b) 8

(c) 12

(d) 2

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Solution

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⎡ ⎢ ⎣ \begin{matrix} x & y & x + y y & x + y & x x + y & x & y \end{matrix} ⎤ ⎥ ⎦

(x^{- 1} + y^{- 1})^{- 1}

\frac{x y}{x + y}

\frac{x + y}{x y}

\frac{x + y}{x y} = 2, \frac{x - y}{x y} = 6 (x \neq 0, y \neq 0) .

5 x + 3 y - 6 z,

x = 3, y = 5

z = 4.

Solve for x and y

2/x+3/y=9/xy and 4/x+9/y=21/xy(x≠0 and y≠0)

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