Question 70Asked in BPSC TRE 3.0 (2024) Mathematics Class 9-10

The value of x that satisfies xˣ = 7ˣ⁺⁴⁹ isx का जिस मान xˣ = 7ˣ⁺⁴⁹ को संतुष्ट करता है, वह है :

x का जिस मान xˣ = 7ˣ⁺⁴⁹ को संतुष्ट करता है, वह है :
  1. A77
  2. B4949
  3. C2121
  4. DMore than one of the aboveउपर्युक्त में से एक से अधिक
  5. ENone of the aboveउपर्युक्त में से कोई नहीं
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Correct answer: (B) 4949

Explanation

Try x = 49: 49⁴⁹ = (7²)⁴⁹ = 7⁹⁸ and 7^(49+49) = 7⁹⁸, so x = 49.x = 49 रखें: 49⁴⁹ = 7⁹⁸ और 7^(49+49) = 7⁹⁸, अतः x = 49।

From BPSC TRE 3.0 (2024) Mathematics Class 9-10 — Previous Year Paper

This is question 70 of BPSC TRE 3.0 (2024) Mathematics Class 9-10 — Previous Year Paper. 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.