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์™ผ์ชฝ๋น—๋ฉด ์˜ค๋ฅธ์ชฝ๋น—๋ฉด ์‚ฌ์ธ๋น„๊ฐ€ 2:1์ด๊ธฐ ๋•Œ๋ฌธ์— ๊ฐ€์†๋„๋„ 2:1์ž„. ๊ทธ๋‹ˆ๊นŒ B๊ฐ€s๋„์ฐฉํ•˜๋ฉด A๋Š” v/2๋กœ ์˜ฌ๋ผ๊ฐ€๊ณ ์žˆ๊ฒ ์ง€? B๋Š” A ๋ฏธ๋ž˜๋‹ˆ๊นŒ ๋งŒ๋‚ ๋•Œ๋Š” ์‹œ๊ฐ„์ƒ์ค‘์ ์ด๊ณ  ๊ทธ๋Ÿผ ๋‹ต์€ v/4.