giúp mình mấy bài trong hình với ạ

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làm ít nhất 3 bài , lm hết = ctlhn ạ xl vì em hết điểm r

pt x^2-2(m+1)x+2m-4=0 Cm nghiệm phân biệt tìm m để A=x1^2+x2^2 đạt giá trị nhỏ nhất

vẽ người ngoài đời thật kiểu 3d ý

Con gì suốt ngày đừng mãi trên câi

Tính tổng A A= ( $\frac{3}{1.8}$ +$\frac{3}{8.15}$ +$\frac{15}{22}$ +....$\frac{3}{106.113}$) - ( $\frac{25}{50.55}$+ $\frac{25}{55.60}$+....+ $\frac{95}{100}$ ) Mong các bạn giúp ạ ! Hứa vote :33

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