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

    Question

    In the following questions two equations numbered I and II are given. You have to solve both the equations. Give answer if;

    I. 3x6- 19x3+16=0 II.

    9y4- 27y2+20=0
    A x < y Correct Answer Incorrect Answer
    B x>y Correct Answer Incorrect Answer
    C x=y or no relationship cannot be established between x and y Correct Answer Incorrect Answer
    D x≥y, Correct Answer Incorrect Answer
    E x≤y Correct Answer Incorrect Answer

    Solution

    Let x3=b 3b2-19b+16=0  3b2-16b-3b+16=0  Pairs are = -16, -3 Values after changing sign = 3, 16 & after dividing by 3, final values of b  = 3/3 , 16/3 x3=1 ,16/3  x=1 , -1 ,∛16/∛3  II) Let y2=a 9a2-27a+20=0  Pairs are -15,-12 Values after changing sign = 15, 12 & after dividing by 9, final values of a = 15/9 , 12/9 =  5/3 , 4/3  y²=  4/3  ,5/3  y=  2/√3, -2/√3, √5/√3 ,-5/√3 Hence, the relationship cannot be established

    Practice Next

    Relevant for Exams: