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Tuy�n t�p d� Ki�m tra h9c Id va Tuy�n sinh 10 Bai 5 (3,5 aiim) Cho hai duong trcm (0) va (O) ti�p xuc ngoai tc;1i A Ke ti�p tuy�n chung ngoai BC, BE (0), c E (O) Duong thing BO cit (0) t�i diSm thu hai la D 1) Chung minh rfulg tu giac COOB la m9t hlnh thang vu6ng 2) Chung minh rfulg ba diSm A, C, D th ing hang 3) Tu D ke ti�p tuy�n DE v6i duong trcm (O) (Ela ti�p diSm) Chung minh rfulg DB = DE HET Tuy�n t�p d� Ki�m tra h9c Id va Tuy�n sinh 10 Bai 5 (3,5 aiim) Cho hai duong trcm (0) va (O) t.
Tuy�n t�p d� Ki�m tra h9c Id va Tuy�n sinh 10 Bai 5:(3,5 aiim) Cho hai duong trcm (0) va (O') ti�p xuc ngoai tc;1i A Ke ti�p tuy�n chung ngoai BC, BE (0), c E (O') Duong thing BO cit (0) t�i diSm thu haila D 1) Chung minh rfulg tu giac CO'OBla m9t hlnh thang vu6ng 2) Chung minh rfulg ba diSm A, C, D th:ing hang 3) Tu D ke ti�p tuy�n DE v6i duong trcm (O') (Ela ti�p diSm) Chung minh rfulg DB= DE - HET Tuy�n t�p d� Ki�m tra h9c Id va Tuy�n sinh 10 Bai 5:(3,5 aiim) Cho hai duong trcm (0) va (O') ti�p xuc ngoai tc;1i A Ke ti�p tuy�n chung ngoai BC, BE (0), c E (O') Duong thing BO cit (0) t�i diSm thu haila D 1) Chung minh rfulg tu giac CO'OBla m9t hlnh thang vu6ng 2) Chung minh rfulg ba diSm A, C, D th:ing hang 3) Tu D ke ti�p tuy�n DE v6i duong trcm (O') (Ela ti�p diSm) Chung minh rfulg DB= DE - HET -SO GIAO Dl}C VA DAO T�O THANH PHO DA NA.NG DE CHiNH THUC Bai (1, aiim) · a) Tlm s6 x kh6ng fun, biSt KY THI TS LO'P 10 THPT NAM 2013 MON:TO.AN (Thai gian lam bai: 120 phut) ,J; = +Ji 1eu· th'uc p = ( r;:; + b) R/ut gQn b";( v2+1 �:;,.;i { 1)( -Ji ) -1 r;:; v2-1 3x+y = S · B'"2 1ru � phuong tr11111 , a1 • (10;1·'" , u1em·,11 o···hA 5x+2y = Bai (2,0aiim) a) Ve d6 thi ham sf> y= � x2 • b) Cho ham sf> b�c nhfit y= a:x-2 (1) Hay xac dinh h? s6 a bi�trfulg a> Ova ve d6 thi ciia ham s6 (1) cilt tf\lc hoanh Ox, tf\lc tung Oy lful luqt tc;1i hai diSm A, B cho OB= 20A ( v6i O la g6c t9a d9) Bai (2,0aiim) Cho phuong trlnh x2 + (m- 2)x-8= 0, v6i mla tham s6 a) Giai phuong trlnh m= b) Tim t.it ca cac gia tri ciia m dS phuong trlnh c6 hai nghi�m x1, x2 cho biSu thuc Q= ( x; -1) ( 4) CO gia tQ 16n nh.lt X1 - Bai (3,5 aidm) Cho AABC n9i tiSp duong tron (O;R) c6 BC= 2R va AB< AC Duong th:ing xy la ti�p tuy�n ciia duong tron (O;R) t