Question 1012709
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1/(a  w)  1/(b  w)  1/(c  w)  1/(d  w)=2w^2 and 1/(a  w^2)  1/(b  w^2)  1/( c  w^2)  1/(d  w^2)=2w then prove that 1/(a  1)  1/(b  1)  1/(c  1)  1/(d  1)=2,there is sign of addition in each term where sign is not visible,please do not consider the sign of multiplicatio expect for 2w and 2w^2
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1. Why do not use the conventional signs?


2. What is the first equality? Is it identity? 
   For what values of w is it valid?

3. Same questions for the second equality.

4. If these equalities are valid for w=1, why do not substitute w=1 directly in them?

5. Take the limit at w ---> 1 
   It might be a joke, or might be a solution.
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