Mathematics
Senior High
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どうしてこのような式ができるのかを教えてください🙏

(2) a+t6=(2+t, 1+3t) で,これが (1,2)と平行だから (2+t) (1+3t)=12 1+3t=2(2+t) よってt=3
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追加質問大歓迎、がんば!

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