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  1. \( {753\times753+247{ \times247-753 \times247} \over 753 \times753 \times753+247 \times247 \times247 }\)=?

    2. A.

    \(\)\( {1 \over1000}\)
    B.

    \(\)\( {1 \over 506}\)
    C.

    \(\)\( {253 \over 500}\)
    D.

    None of these

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    Answer : Option A

    Explanation :

     

     Given Exp =\( {(a^2+b^2-ab) {} \over(a^3+b^3) }\)\( {1\over a+b}\)=\( {1{} \over (753+247)}\)=\( {{1} \over 1000}\)

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