+1 vote
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​​Let $a$ be the root of the polynomial $f(x)$ of multiplicity 1. Then $a$ is a root of polynomial $((x-a) / 2) (f’(x) + f’(a)) – f(x) +f(a)$ of multiplicity

1. exactly 4
2. at least 4
3. at most 2
4. exactly 1

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0

D. Exactly one?