(i) √(100x⁴ + 125x⁴) + 7x + 2 = −4x (ii) ∛(64y³) × 2y + 19y + 7² = −3y +…

IBPS · 2022

(i) √(100x⁴ + 125x⁴) + 7x + 2 = −4x
(ii) ∛(64y³) × 2y + 19y + 7² = −3y + 1600^(1/2)
If the smallest root of equation (ii) is multiplied by 4/5, it equals Z, then which of the following statement/s is/are true?
(A) Z < −2
(B) 2/7 > Z × (−4/27)
(C) Z is less than the largest root of equation (i)

  1. A.

    Only (B)

  2. B.

    Both (B) & (C)

  3. C.

    Only (C)

  4. D.

    Both (A) & (B)

  5. E.

    Only (A)

Attempted by 13 students.

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Correct answer: B

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