... https://www.facebook.com/groups/toanmath Cõu 4(1 ,0 ) Mt cu (S) cú tõm I(2;3; 3), bỏn kớnh R 22 (3 )2 (3 )2 17 cỏch t tõm I n mp(P): 2(3 ) 2(3 ) d d(I ,(P )) 1R 2 (2 ) Vỡ d(I ,(P )) R nờn (P) ct mt cu (S) theo giao tuyn ... (t 3 4 )( t 29 0) ; t ( 0;34 ; f ' (t ) Xột hm s f (t ) t t 128 (t 12 8) (t 12 8) 1622 (t 3 4 )( t 29 0) f ' (t ) 0; t ( 0;34 (t 12 8) (t 12 8)2 Hm s f(t) nghch bin trờn (0 ;34] nờn f(t) ... y= 6(x 2)+ 5/2 ( nhn) M 0(- 1;-2)tip tuyn ti M0 cú pt l y 6( x 1) =6x+4(nhn) Cõu 2(1 ,0 im) 2a(0,5 TX: D=R im) y (ex ) (x x 1) ex (x x 1) ex (x x 1) ex (2 x 1) x 0,25 0,25 0,25 e (x...