... x 1 I1 I2 dx ln x x 1 ln x x 1 u ln x; dv 3 dx ln x dx dx x 1 x 1 2 ln ln ln dx dx x 1 du dx 1 ; v x x 1 dx ln x ln 1 0 ... 19 xM yM 19 (th a mãn) V y A(–4;3) Câu 4 x3 12 x2 15 x y 1 y (1) 6 x y x 26 16 x 24 y 28 (2) K: y (1) x3 24 x2 30 x y y 14 ... 1 2x y 1 y x2 x ng trình (2) ta đ c: x x2 x x 26 16 x 12 x2 x 28 12 x3 48 x2 62 x 12 x2 10 x x 1 x x2 10 ...