so c@
DE KIEM TRA DINII Xi, ;-An t Nim hgc zor4 -zatr N[6n: Tofn - Ld'p 5
flicti gran lam ht)i, 90 phir lkhong k0 rhoi gian giao tlii
CAu 1, (2,0 iti1m\
Ihuc hiQn c6c ph6p tfnh sau: l) 21 .17 +24-2'7 - 2t: .l) ls. l0l - 2'. l0 t' :
UBND rixH nAc r-txt-t ritO
2) (-i2.1 + (- e) + 121 + i-zo , 1) ;t4:{z[lr,* (+'- r,)]]
Ciu2. (2,5 d!€rn) 'Iinr x bi6t; 1) 6,x-5: 19 3) i2x-33--32.3':
U 3x+2:20+ (.-',.2); 4) (rr-1) r(xr-2)+ +(x+1C0)=5750.
Ci!3. (1,5 iti1m\
Hu CAu 4.,(3,0 fiAmt l'r0n tia Ox liy hai di6rn A l,ii B sao clio OB :4cur. ()r\ - 8cni.
l) Tinh d6 dai doan AB" ?) Di6m B co la trunq cJi0nr cua ctoan CA kh6ng? Vi saol, 2 Qfu 5. (1,0 di€mr 3) vd di6rrr K thuQc tia cl5i cua tia RA sao ciro BK = 4fl . T'inh ,tK. rang ve duoc t6t cit 110 clircviig lirlng tu 20 clic.nr di ctru. HET (Di girn co 0I trang) Cho 20 di6m, troug dir r:o a cti6m thing irdng. (lri 2 i1i0m, ta v0 tndt driirpg thiing. Tip a. bi6t [{9 r,i t6n thi sinh:....,.. l-h[ sinh khbn.q durtc' st1 d4ng tdi li€.n. Giarn thi khong giiri thicl,t 51i thant. ...: S0 bio dan}r
