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Clearnote
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Senior High
Mathematics
想問22題DE選項
Mathematics
Senior High
8 monthsago
fighting!
想問22題DE選項
平) 第三章 平面向量 22.P為△ABC 內部一點,PA+2PB+3PC=0,PA、PB=4, PB.PC =-2, PC.PA=-2,則下列何者為真? AB(A)IPA=Vi4 (B) AP = AB+ 3 1 -AB+AC 2 (C)AB=√29 27 (D)△ PAB = √82 2 (E)△ABC=36。 ((A)(B)(E)) (D) JETIT (111附中) (A). PA1+2 PB-PA +3 PC - PA=0 -4-6 21PB| + PA PB+ 3PC PB IPA1-8-6=8 |PA|= √14 (B) AP = 2PB + 3 PC FrB1 = 4₁₂ = 5 AB AP-246-+3(-)= |F6-PA\" 60=26+诫 AP = = AB+ AL -PB-2-PA PB+A 5+8+14=29
平面向量
Answers
😙
8 monthsago
如圖
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