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本題是幾何概型問題,測度為長度.由恰好使1是關於x的不等式2x2+ax-a2<0得:2×12+a×1-a2<0⇒a<-1或a>2.∴“恰好使1是關於x的不等式2x2+ax-a2<0的一個解的概率”事件對應的區域長度為7.則恰好使1是關於x的不…
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