[線代] 一題證明

[j0958322080 (Tidus)]

c in F and v in V，prove when cv = 0 ---> c = 0 or v = 0

老師上課是說 let cv = 0 is statemant P
                 c = 0 or v = 0 is statemant Q
然後寫下XX表，但這個證明我看不懂，

有沒有其他的證明方法??

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推 asynchronous:兩邊乘 c^-1