问一个CS的题目，没看懂意思~

marffinUID: 171144

A        B        C        f
         -----------------------------
        0        0        0        1
        0        0        1        1
        0        1        0        1
        0        1        1        x
        1        0        0        1
        1        0        1        0
        1        1        0        1
        1        1        1        x

Consider the logic function in the table above, where x denotes a don't-care value. Which of the following statements describes correctly the relation between the minimal sum and the minimal product form of f?
They are logically equivalent by definition
They are logically equivalent because don't care's are used in the same way
They are logically equivalent because don't care's do not matter
They are logically not equivalent by definition
They are logically not equivalent because don't care's are used in different ways

这里的“the minimal sum and the minimal product form of f”没看懂，哪位达人能帮忙解释一下？

AutoseaUID: 192045

最小项之和，最大项之积？

yuzisunUID: 155784

like AB+BC+CD  and  (A+B)(B+C)