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7th Class Mathematics Sample Paper Maths Olympiad Model Test Paper-5

  • question_answer
    Find the value of\[\frac{{{x}^{3}}+{{y}^{3}}+{{z}^{3}}-3xyz}{{{x}^{2}}+{{y}^{2}}+{{z}^{2}}-xy-yz-zx}\], if  \[x=1,\]\[y=2\]and \[z=-1\].

    A)  24                               

    B)  14

    C)  7                                

    D)  2

    E)  None of these

    Correct Answer: D

    Solution :

     Not Available


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