设f(x)=ax3+4x2x−2f(x)=\dfrac{ax^3 + 4x^2}{x - 2}f(x)=x−2ax3+4x2有可去间断点x=2x = 2x=2,则a=a =a=( ).
(A)−1-1−1
(B)222
(C)eee
(D)000
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