Tính vectơ, tính các điểm cực trị, tọa độ?

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Chắc suất Đại học top - Giữ chỗ ngay!!

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y= x^4 - 2(m+1)x^2 + m
y' = 4x^3 - 4(m+1)x
y' = 0 \Leftrightarrow x = 0 , x = +- căn(m+1)
Các điểm cực trị tại A (0,m) , B(căn(m+1), -m^2 - m - 1) , C(-căn(m+1), -m^2 - m - 1) ??? tính sao vậy mọi người :((
Và , OA = BC \Leftrightarrow OA^2 = BC^2
\Leftrightarrow m^2 = 4(m+1) ?!! tính OA BC sao dạ? :( giúp em với , e k hiểu cái này tí nào hết :((
 
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Bạn cần nhớ công thức: $A(x_1; y_1); B(x_2;y_2)$
Thì $AB = |\vec{AB}| = \sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$
nhé
 
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