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Question 39Asked in CIL MT Systems, 27 Feb 2020 (8:00 AM)

If x = (√7 − √5) / (√5 + √7) and y is reciprocal of x, then what is the value of √(x³ + y³)?

  1. A3√47
  2. B√47
  3. C6√47
  4. D5√47
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Correct answer: (C) 6√47

From CIL MT Systems PYQ, 27 Feb 2020 (8:00 AM)

This is question 39 of CIL MT Systems PYQ, 27 Feb 2020 (8:00 AM). See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.