hing.
Cflu IỊ (2 diem) 1) Giai phuong trinh
, ( z**]f[)* 16= rEsin2r* 26ri,r'It* t )
\ 2) \2 t2)
2) Giai hQ phuong trinh
2) Giai hQ phuong trinh cdu ngo4i ti6p hinh ch6p ỌABC vd t4o v6i m[t phing Oxy mQt g6c 45o .
C0u VIIạ Q diA@ Gi6i phucrng trinh
3x-l x 6x-2
16.9 , -1 - 793.36- -t + 81.2F = 0. B. Theo chuong trinh Nflng cao
Cflu VIb. 1z diery)
1) Trong mflt ph[ng tqa d0 Oxy, cho hinh thoi
PHAN RIONG
(Thi sinh chi ttuqc chgn mQt trong hai phdn A ho{c B)
e2
rinh tich ohdn I= !-'1*{;" *
,e Cflu IV. (l di€m)
Cho hinh ch6p tu gi6c SABCD c6 d6y ABCD
li hinh vu6ng tirrr O cqnh 2ạ Duong cao ,SI/ ctra tam gi6c SBDo6 d0 dni bing
*, ,
li trung dii5m cria OD. }/rln b€n (SBQ li tam gi6c cdn.tai S v6i SB : SQ : 3ạ Gqi M lil
trung tli6m cira ,SC E ld di6m n6m tr6n cpnh SD vdi ES =ZED vd F li giao dii5m cua EC vir DM. Tinh th6 tich kh6i ch6p M.HCB vit khoflng cich gifta OF, SB theo ạ
CAU V. Q diem)
Cho a,b,c ld c6c s6 thgc thoa mdn a + b + c =l
vd ab+bc+ca>0. Tim gi6trinho nh6t cira
bi0u thric
_2225
lr--...-:-:-r-
' -
la-bl' lb-'l l, -rl' Jrb+br+*'
ABCD c6 4 dinh trung v6i c6c dinh cria mQt
elip, b6n kinh duong trdn nQi ti6p hinh thoi
bengJl,. Vi6t phuong trinh chinh tic cịr-elip, bi€t tdm sai cira elip ld e:0,5. elip, bi€t tdm sai cira elip ld e:0,5.
2) Trong kh6ng gian v6i h0 truc toq dQOxyz,
cho dii5mM(0;2;0) vd hai ducrng thing
lx=l+2t lx=3+2s
tt
Ar:i ' t' y =2-2t L,t:1y=-l-2s- l'lz=-l+t; [z=s. lz=-l+t; [z=s.
Vi6t phucrng trinh m[t phing (P) di qya M
song song vdi tryc Ox, sao cho (P) cdt hai ilucrng thing Lr,Lr ldn luqt tqi A, B thoir mdnAB =1.
Cflu VIIb. Q diefi Gi6i phumg trinh (3'-2)log3
l=+-?.s*
TNANNIIỊLONG
(GVTHPTNgyhHtruHuan, ThuDit, TP. HA Chi Minh)
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