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9. 投籃比賽中,參賽者在限定時間內能隨意投 2分球或 3分球。今多多代表班上參加比賽,裁判跟他說:「總共投進 15顆球,得 36分。」,則多多共投進幾顆 3分球?(A) 3 (B) 6 (C) 9
問題詳情
9. 投籃比賽中,參賽者在限定時間內能隨意投 2分球或 3分球。今多多代表班上參加比賽,裁判跟他說:「總共投進 15顆球,得 36分。」,則多多共投進幾顆 3分球?
(A) 3
(B) 6
(C) 9
(D) 12
參考答案
答案:B
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假設 投進x顆三分球,15-x顆兩分球x*3★+(1...
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