De thi dai hoc nam 2015 lan 1 mon toan cua Nhat Ban (de 1) De thi dai hoc nam 2015 lan 1 mon toan cua Nhat Ban (de 1) De thi dai hoc nam 2015 lan 1 mon toan cua Nhat Ban (de 1) De thi dai hoc nam 2015 lan 1 mon toan cua Nhat Ban (de 1) De thi dai hoc nam 2015 lan 1 mon toan cua Nhat Ban (de 1)
1 P D 10a2 C 14ab 21bc 15ca P A P D 5a D p 14b D p 2C p p aC 15c D P D B b Á p 12 p C F E C a q G D H I P c Á 2 A B A A A 2 KL M N O PQ 2 J 4 B B B RS TU ` W y D ax C 2bx C c m W y D a C 1/x C 2.b C 2/x C c C A B C D A B C B C D A A B C B C x2 C C D x D cD 1) 1) y IJ C xC C x D0 FG x a b c AB=BC CO=OD B m B C DE x B ` ` m A b D A H a D M N symmetry AB=BC K L 3a C a2 C a 3a C D b a2 C D b b2 O PQ bC R a2 C a2 C c a2 C D bc b b UV aD YZ S c bC T Á D a UV bD WX 15 19 23 x x 15 x 19 x 23 x 3 x< AB x x2 CD xC EF G