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    Question

    data-sheets-value="{"1":2,"2":"If a = 4.965 , b = 2.343 and c = 2.622 then value of a^3-b^3-c^3-3abc is "}" data-sheets-userformat="{"2":769,"3":{"1":0},"11":4,"12":0}">If a = 5.392, b = 2.634 and c = 2.758 then value of a3- b3- c3 - 3abc is.
    A 1 Correct Answer Incorrect Answer
    C 2 Correct Answer Incorrect Answer
    D 3 Correct Answer Incorrect Answer

    Solution

    we know that if a + b + c = 0
    then a3 + b3 + c3 = 3abc
    Here a = 5.392, b = 2.634 and c = 2.758 and a + (-b) + (-c) = 0 so by the above formula
    a3 + (-b)3 + (-c)3 = 3a(-b)(-c)
    OR a3 - b3 - c3 = 3abc
    OR a3 - b3 - c3 - 3abc = 0

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