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Multiplicity of a Polynomial Zero

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The polynomial function ff is defined by f(x)=x48x3+24x232x+16f(x) = x^4 - 8x^3 + 24x^2 - 32x + 16. Given that x=2x=2 is a zero of ff, what is the multiplicity of this zero?

A

1

B

3

C

2

D

4

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