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JAMB Mathematics 1985 Question 25

Question 25

Algebraic Expressions

If f(x − 2) = 4x2 + x + 7 find f(1)

  1. A.12
  2. B.27
  3. C.7
  4. D.46
  5. E.17.
Show the answer and explanation

Answer: D (46)

Explanation

f(1) needs x − 2 = 1, so x = 3: 4(9) + 3 + 7 = 46.