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If two distinct non-zero real variables $x$ and $y$ are such that $(x+y)$ is proportional to $(x-y)$ then the value of $\frac{x}{y}$

  1. depends on $x y$
  2. depends only on $x$ and not on $y$
  3. depends only on $y$ and not on $x$
  4. is a constant

     

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