Evaluate- 2x-y-x-y-1 - 1-y-x-y

The correct option is D 1 ( 2x+y/x+y 1 )÷ (1 y/x+y ) = #160; [ 2x+y ( x+y )/x+y ]÷ [ x+y y/x+y ] = #160; x/x+y×x+y/x=1 ...

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Applications of Dot Product

Evaluate: 2...

Question

Evaluate: $(\frac{2 x + y}{x + y} - 1) \div (1 - \frac{y}{x + y})$

x

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y

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x y

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1

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Solution

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∣ ∣ ∣ ∣ \begin{matrix} 1 & x & y 1 & x + y & y x + y & x & y \end{matrix} ∣ ∣ ∣ ∣

∣ ∣ ∣ ∣ \begin{matrix} 1 & x & y 1 & x + y & y 1 & x & x + y \end{matrix} ∣ ∣ ∣ ∣

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