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A convex lens of focal length f produces a real image x times the size of an object, Then what is the, distance of the object fromthe lens?

  1. open parentheses x plus 1 close parentheses f
  2. open parentheses x minus 1 close parentheses f
  3. open curly brackets fraction numerator x plus 1 over denominator x end fraction close curly brackets f
  4. open curly brackets fraction numerator x minus 1 over denominator x end fraction close curly brackets f

The correct answer is: open curly brackets fraction numerator x plus 1 over denominator x end fraction close curly brackets f

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