Trong mp(Oxy) cho A(-3;2); B(6;1), C(0;4).
a) Chứng tỏ A, B, C là 3 điểm không thẳng hàng.
b...
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Mathematics, 08.12.2021 15:20 xchainq
Trong mp(Oxy) cho A(-3;2); B(6;1), C(0;4).
a) Chứng tỏ A, B, C là 3 điểm không thẳng hàng.
b) Tìm tọa độ điểm D sao cho ABCD là hình bình hành.
c) Tìm tọa độ điểm E sao cho B là trọng tâm của tam giác OAE.
d) Gọi A' là điểm đối xứng của A qua trục Ox. Tìm giao điểm của đường thẳng A'B với trục Ox.
e) Tìm điểm M trên Ox sao cho AM+MB ngắn nhất.
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