這個數學裏就叫做充分條件,if and only if / iff。
滿足了充分條件,結論當然就正確了,跟單變量思維有什麽關係?
這個數學裏就叫做充分條件,if and only if / iff。
滿足了充分條件,結論當然就正確了,跟單變量思維有什麽關係?
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if "三條邊相等", then "兩個三角形全等", if "兩條邊與夾角相等", then "兩個三角形全等"
-bebe2014-
♂
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08/23/2019 postreply
07:45:53
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