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A polynomial is defined by \(f(x + 1) = x^{3} + px^{2} - 4x +...

Further Mathematics
WAEC 2012

A polynomial is defined by \(f(x + 1) = x^{3} + px^{2} - 4x + 2\), find f(2).

  • A. -8
  • B. -2
  • C. 2
  • D. 8
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Correct Answer: Option C
Explanation

Given: \(f(x + 1) = x^{3} + 3x^{2} - 4x + 2\). 

\(f(2) = f(x + 1) \implies x + 1 = 2; x = 1\)

\(f(2) = 1^{3} + 3(1)^{2} - 4(1) + 2 = 1 + 3 - 4 + 2 = 2\)


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