Rốn luyn hm c trng vi h cha cn y 4x + + 4x +1 = x +12x 5y + Bi Gii h phng trỡnh x + x y 3y + = y x x x y + + y = x x +1 y 3y + Bi Gii h phng trỡnh y2 x log2 (x + y ) = log2 (3 y 2) (2 x +1 7x y + 3)( 4y +1 +1) = 16x y Bi Gii h phng trỡnh x y = 2x x y +16 y x 16 =16 Bi Gii h phng trỡnh trờn s thc: (x y)3 + x y + = ( y + 2) y (x y)3 + 2x +10y 33 = (8y 14) y Bi Gii h phng trỡnh x y + y x = Bi Tỡm tt c cỏc nghim (x;y) vi x > 0, y >1 tho h phng trỡnh: (y + 2y) x + x (y +1) = x(4y + 3) = 3(y +1) (2x 1) x + y = (6 x y) x Bi Gii h phng trỡnh 12x + 3xy 18x = x 6x y + x2 +3 log2 (x + x + +1) = yx1.log2 (y) Bi Gii h phng trỡnh 2 x + x + = y 2xy + x x + x + y 2y = Bi Gii h phng trỡnh 4y x + x + = 2y y 8x x +12x + 5y 16 x + = Bi 10 Gii h phng trỡnh 2x + x x = y + x +1 Thy: ng Thnh Nam (Hotline: 0976.266.202) website: www.vted.vn 2(y +1)2 + 2y y +1 2x = Bi 11 Gii h phng trỡnh x 1+ x 2x + = 8x 16y + 7x + y + 3xy(x y)12x + 6x = Bi 12 Gii h phng trỡnh trờn s thc: 18x 9x = + + 25(y 1) x y 2y + x + 2y x + + 6x y = x + + Bi 13 Gii h phng trỡnh (x y)3 2x y = (x + 6) x + + (4x +1)x + (y 3) 2y = 2x 2y Bi 14 Gii h phng trỡnh 4x + y + 4x = x + x2 = y + y2 + Bi 15 Gii h phng trỡnh trờn s thc 3 x y = 3x 3y + x x + x + = ( y + ) ( x + 1)( y + 1) Baứi 16 Giaỷi heọ phửụng trỡnh 4x y + + 8x = 4x 4x x + 2 x+3y+2y + 4.2 x+2y = 2x+3y + 4( y+1) Bi 17 Giaỷi heọ phửụng trỡnh 2 2x 2y = 2y + 2y x + xy 2y2 + 2y 3x + ( ) ( ) + 16.4 x2 y = + 16 x2 y y x + Bi 18 Gii h phng trỡnh x + 17 x + 10 y + 17 = ( x + ) y + 11 2x2 + 5y2 4xy 6x 6y + = Bi 19 Giaỷi heọ phửụng trỡnh ( x 1) xy + 2x = ( y + 3) y+2 ( ) ( ) 3x y + ln x 3ln y = Bi 20 Gii h phng trỡnh 2 x + 1+ y y + 1+ x = ( )( ) Thy: ng Thnh Nam (Hotline: 0976.266.202) website: www.vted.vn ( ) x + 3x y y + y 2 y = Bi 21 Gii h phng trỡnh 2 2x + y + 4x y x 3x + = ( xy x + y 1) x + 2x + = y Bi 22 Gii h phng trỡnh 3 + = 11+ 6x x y y x = y + + y x3 Bi 23 Gii h phng trỡnh trờn s thc 2x 3x y = x 2x + + Ht _ Chỳc cỏc em hc tt! Thy: ng Thnh Nam (Hotline: 0976.266.202) website: www.vted.vn