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SSC Sample Paper SSC-CGL TIER - I Sample Test Paper-2

  • question_answer
    If \[x=5,\,\,y=6\] and \[z=-11\]then the value of \[{{x}^{3}}+{{y}^{3}}+{{z}^{3}}\] is:

    A)  - 890               

    B)  - 970

    C)  - 870               

    D)  - 990

    Correct Answer: D

    Solution :

     Given that x = 5, y = 6 and x= -11 Now, \[{{x}^{3}}+{{y}^{3}}+{{z}^{3}}=3xyz;\] when \[\left[ x+y+z=0 \right]\] \[\therefore \]  \[{{x}^{3}}+{{y}^{3}}+{{z}^{3}}\]= 3(5) (6) (-11) = \[\]


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