✨ Best Answer ✨
1, 2, 2, ..., 10, 10, 10
總共有幾個數
1+2+3+...+10
= 10×11/2
= 55
剛好最後一個10就是第55個數
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✨ Best Answer ✨
1, 2, 2, ..., 10, 10, 10
總共有幾個數
1+2+3+...+10
= 10×11/2
= 55
剛好最後一個10就是第55個數
Users viewing this question
are also looking at these questions 😉
