在平行四边形ABCD中,向量AB=(1,3) 向量AC=(2,5),则向量AD=?,向量BD=?

网友回答

AD = BC= BA+AC
= -AB + AC
= -(1,3) + (2,5)
= (1,2)
BD = BA + AD
= -AB + AD
= -(1,3) + (1,2)
= (0,-1)
======以下答案可供参考======
供参考答案1:
AD=AC-AB=(1,2)
BD=BA+AD=(0,-1)