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OAU Post-UTME Mathematics 2022 (Batch A) Question 1

Question 1

Indices

Simplify √[(8x3y6)/(45z2w7) × (5z2w)/(2x5y4)]

  1. A.2y/(3xw3)
  2. B.2y/(3xw2)
  3. C.2xy/(3w3)
  4. D.3xw2/(2y)
Show the answer and explanation

Answer: A (2y/(3xw3))

Explanation

Multiply out: 40x3y6z2w/(90x5y4z2w7) = 4y2/(9x2w6). Its square root is 2y/(3xw3).