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8th Class Mathematics Sample Paper Maths Olympiad Model Test Paper-7

  • question_answer
    If \[x-{{a}^{1/2}}+{{a}^{-1/2}},\] \[y={{a}^{1/2}}-{{a}^{1/2}},\] then value of\[({{x}^{4}}-{{x}^{2}}{{y}^{2}}-1)+({{y}^{4}}-{{x}^{2}}{{y}^{2}}+1)\].

    A)  9                    

    B)  25

    C)  14                               

    D)  16

    E)  None of these

    Correct Answer: D

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