Mathematics
Senior High
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ベクトルのこの2問の解説をお願いします🙇♀️
19AABCにおいて、
₁² = 0A²₁
1a1=3₁
TAB = DB-OA
=店とおくとき、
151 = 4² ã · 5 = 5 2730 Abak 1/Z?
ABの長さは?
答えは√15らしい
12. AABCにおいて、
AB· AC 11?
AB= 1₁ BC= 13. CA=8a²²₁
答え:-28
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