Question: If f ( x ) = x 3 + x 2 - x + k and ( x - k ) is a factor of

If f(x)=x3+x2-x+k and (x-k) is a factor of f(x), then k=
If f(x)=x3+x2-x+k and (x-k) is a factor of f(x), then k=

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