of rru cr[Ia Hgc ri z lzoor - 200s) - Lop 2 cN
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' THOI GIAN : 90 PHUT.
Bni 1 : (4tt): Trong kh6ng gian Ra cho dnh x4 tuy6n tinh f
sd cho tru6c li :
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b) Tim c6c co sd tr.ue chuAn c&a Kerf vit lm f .
Bni 2 (3d): rr€n R3 cho d4ns todn
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a) Tim ma tr4n cria d4ng toan phuong e(x) \iA _& 3J b) T]m 1 co sd truc chuAn eria R3 sao cho eoi voi co sd ndy thi dang toli" Y- v '') -Ahucngtren46 dang chinh tic _ - _-.%.+
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Bii 3 (1d) Trdn ft2, bho ph6p bitin eloi tuyiin tinh / c6 ma tr4n bi€u di6n ld c.
Gii str ma tr{n c c6 circ giittriri6ng l6n luqt ld l vd ), phtnbiQt vi dou kh6c 0 chung minh ma tr{n c khe nghich vi tim c6c gi6rri ri€ng
cta ma trdn C-t
Bii 4 (2tl) Cho da thr?c f (*) xr =2x7
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