New RBI Grade B 2025 Notification will come Soon! Enroll Here

    Question

    If (x

    –1.3)3+(x–1.4)3+(x–1.5)3 = 3(x–1.3)(x–1.4)(x–1.5), Then x = ?
    A 1.5 Correct Answer Incorrect Answer
    B 1.4 Correct Answer Incorrect Answer
    C 1.3 Correct Answer Incorrect Answer
    D 1.6 Correct Answer Incorrect Answer

    Solution

    if a+b+c = 0 then a3+b3+c3 = 3abc and it is also vice versa. So Here (x-1.3)+(x-1.4)+(x-1.5) =0 so 3x-4.2 = 0 or x = 1.4 ` `

    Practice Next

    Relevant for Exams: