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  9. Q24

BPSC (Bihar PCS) 2019 · Question 24 of 148

If (5)x2+2x+7 = (125)2x+1 then the value of x is

Mental Ability

  1. A1
  2. B5/8
  3. C39/4
  4. D39/8Correct
  5. ENone of the above/More than one of the above

Answer: D. 39/8

Explanation

Equating exponents of 5 on both sides, the key gives option D (39/8).

Source: Jagranjosh

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