Đề thi Học kì 1 Toán 10 năm 2024-2025 trường THPT chuyên Lê Hồng Phong (Tp.HCM)

7

$\sqrt{61}$

$\sqrt{97}$

49

18

15

46

40

$[-1; 5]$

$[-2; 7)$

$[-2; -1)$

$(-1; 5]$

$\overrightarrow{AI} + \overrightarrow{AB} = \overrightarrow{0}$

$\overrightarrow{AI} + \overrightarrow{BI} = \overrightarrow{0}$

$\overrightarrow{CI} + \overrightarrow{AI} = \overrightarrow{0}$

$\overrightarrow{BI} + \overrightarrow{CI} = \overrightarrow{0}$

4

6

5

7

(0; 0)

(1; 1)

(-1; 1)

(-1; -1)

$\dfrac{76}{7}$

$\sqrt{\dfrac{76}{7}}$

7.

49.

$\overrightarrow{AB} \cdot \overrightarrow{BC} = -\dfrac{a^{2}}{2}.$

$\overrightarrow{AB} \cdot \overrightarrow{BC} = \dfrac{a^{2} \sqrt{3}}{2}.$

$\overrightarrow{AB} \cdot \overrightarrow{BC} = \dfrac{a^{2}}{2}.$

$\overrightarrow{AB} \cdot \overrightarrow{BC} = -\dfrac{a^{2} \sqrt{3}}{2}.$

$S=\dfrac{1}{2}AB \cdot BC \cdot \sin A.$

$S=\dfrac{1}{2}AB \cdot BC \cdot \cos A.$

$S=\dfrac{1}{2}AB \cdot AC \cdot \cos A.$

$S=\dfrac{1}{2}AB \cdot AC \cdot \sin A.$