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kunlove_pun

[TẶNG BẠN] TRỌN BỘ Bí kíp học tốt 08 môn
Chắc suất Đại học top - Giữ chỗ ngay!!

ĐĂNG BÀI NGAY để cùng trao đổi với các thành viên siêu nhiệt tình & dễ thương trên diễn đàn.

bài 1) cho y=x+1/x-1
tìm trên Oy tất cả các điểm từ đó kẻ được duy nhất 1 tt đến đthị . .
bài 2) cho y= x+2/x-1 A(0 :a)
tìm a để từ a kẻ đc 2 tt đến đồ thị sao cho 2 tiếp điểm tương ứng nằm về 2 phái so với trục hoành
bài 3 ) cho y \frac{1}{3}mx^3 + (3m-1)x^2 + (4 - 3m) +1
tìm m sao cho trên đồ thị tồn tại duy nhất 1 điểm có hoành độ âm mà tt tại đó vuông góc với đt d : x + 2y - 3 = 0

hocmai giải giùm e với . .2 đăng 2 bài mấy ngày rồi mà không ai trả lời giùm e cả . .càng chi tiết càng tốt ạ . .e cảm ơn
 
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nguyenbahiep1

kunlove_pun said:
bài 1) cho y=x+1/x-1
tìm trên Oy tất cả các điểm từ đó kẻ được duy nhất 1 tt đến đthị . .
Bấm để xem đầy đủ nội dung ...

vì bạn chưa hỏi đúng thời điểm thôi

câu 1


[laTEX]M (x_0,y_0) \\ \\ A(0,a) \\ \\ (d):pttt: y = \frac{-2}{(x_0-1)^2}.(x-x_0) + \frac{x_0+1}{x_0-1} \\ \\ A \in (d) \Rightarrow a = \frac{2x_0+x_0^2-1}{(x_0-1)^2} [/laTEX]

đến đây biện luận theo a để pt trên có 1 nghiệm [laTEX]x_0[/laTEX] duy nhất bạn tự làm được rồi nhé
 
H

hocmai.toanhoc

Chào em!
Em xem cách làm ở đây nhé!
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