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UI Post-UTME Mathematics 2016 Question 7

Question 7

Indices

5x+1 = 625, find x

  1. A.1
  2. B.2
  3. C.3
  4. D.4
Show the answer and explanation

Answer: C (3)

Explanation

625 = 5⁴, so x + 1 = 4 and x = 3.