1,cho duong tron (C) : x2+ y2+2x - 4y = 0 Diem M( 4,7)a, chung minh diem M(4,7) nam ngoai (C)b, viet phuong trinh tiep tuyen cua (C) biet tiep tuyen qua M 2, viet pt duong tron (C)co ban kinh r=2 (C)tiep xuc Ox va co tam thuoc duong thang d : x+y - 3 = 03, cho duong thang denta : 3x - 4y - 31 = 0 ; M(1;7)a, chung minh M thuoc dentab, lap trinh duong tron (C) ban kinh r = 5 va tiep xuc duong tron denta tai...
Đọc tiếp
1,cho duong tron (C) : x2+ y2+2x - 4y = 0
Diem M( 4,7)
a, chung minh diem M(4,7) nam ngoai (C)
b, viet phuong trinh tiep tuyen cua (C) biet tiep tuyen qua M
2, viet pt duong tron (C)co ban kinh r=2 (C)tiep xuc Ox va co tam thuoc duong thang d : x+y - 3 = 0
3, cho duong thang denta : 3x - 4y - 31 = 0 ; M(1;7)
a, chung minh M thuoc denta
b, lap trinh duong tron (C) ban kinh r = 5 va tiep xuc duong tron denta tai M
刚发少吃醋把做下 >:33
mik ko hiu