New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    src="https://www.ixambee.com/questionimage/SSC-CHSL-Tier-1/1645785251-SSCCHSL001.png" alt="" />
    A 8 Correct Answer Incorrect Answer
    B 7 Correct Answer Incorrect Answer
    C 6 Correct Answer Incorrect Answer
    D √56 Correct Answer Incorrect Answer

    Solution

    Let x = √(56+√(56 +√(56+ √(56+√(56+)…∞ )))) x = √(56+x) Squaring both the sides, x² = 56 + x x² - x – 56 = 0 x² - 8x + 7x – 56 = 0 x(x-8) + 7(x + 7) = 0 x = 8 , -7 Alternate method: Split 56 in the product of two consecutive numbers i,e. 7 & 8 and the highest number is the answer. So answer is 8.

    Practice Next

    Relevant for Exams: