... 4 2 x d xI dx xx x+= = = + =+ +Ú Ú0 ,25 2 2 2 2 2 2 2 24 2 1 1 1 2 1 11 11111 2 xx xI dx dx dxxxxxx+ ++= = =+Ê ˆ+- +Á ˜Ë ¯Ú Ú Ú0 ,25 Đặt 2 2 2 1 1 1 2 tan 1 2 2(1 ... ++Ú 2 2 2 24 3 2 3 2 4 4 41 1 1 1 2 11 1 1x x x x xI dx dx dx dxx x x+ + + += = + ++ + +Ú Ú Ú Ú0 ,25 www.DeThiThuDaiHoc.comwww.MATHVN.com 2 21111I dx x= = =Ú; 2 2 2 3 44 2 4 ... z a b+ - + + + =0 ,25 Theo giả thi t 2 2 2 | 3 2( 10 8 ) 10 10 |([ ;( )] 29 29 (10 8 )a b a b a b d C Pa b a b- + + + + += € =+ + + 2 2 2 2 2 | 29 29 | 29 . 101 160 65 29 ( ) 101 160 65a b...