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WAEC Mathematics 2015 Question 7

Question 7

Indices

If 2n = y, find 2(2+n/3)

  1. A.4y1/3
  2. B.4y−3
  3. C.2y1/3
  4. D.2y−3
Show the answer and explanation

Answer: A (4y1/3)

Explanation

22 + n/3 = 2² × (2n)1/3 = 4y1/3.