# Toan-DADe_kiem_tra_dinh_ki_so_01 - Kha h c Ton 12 Th y L B...

• Test Prep
• 2

This preview shows page 1 - 2 out of 2 pages.

Khóa học Toán 12 – Thầy Lê Bá Trần Phương Hướng dẫn giải ñề kiểm tra ñịnh kì số 01 Hocmai.vn – Ngôi trường chung của học trò Việt Tổng ñài tư vấn: 1900 58-58-12 - Trang | 1 - x y 2 3 4 4 2 O 1 Bài ðáp án ðiểm 1 (6,0 ñiểm) a. (4,0 ñiểm) circle3 Tập xác ñịnh: D R = circle3 ðạo hàm: 2 3 12 9 y x x ′ = − + circle3 Cho 2 1 0 3 12 9 0 3 x y x x x = ′ = ⇔ − + = = circle3 Giới hạn: lim ; lim x x y y →−∞ →+∞ = +∞ = −∞ 1,0 circle3 Hàm số ñồng biến trên khoảng (1;3), nghịch biến trên các khoảng (– ;1), (3; + ) circle3 Hàm số ñạt cực ñại y = 4 tại x = 3 ; ñạt cực tiểu CT 0 y = tại CT 1 x = 1,0 circle3 Bảng biến thiên: x 1 3 + y 0 + 0 y + 4 0 1,0 circle3 Giao ñiểm với trục hoành: 3 2 1 0 6 9 4 0 4 x y x x x x = = ⇔ − + + = = circle3 Giao ñiểm với trục tung: 0 4 x y = = 1,0 HƯỚNG DẪN GIẢI ðỀ KIỂM TRA ðỊNH KÌ SỐ 01 MÔN: TOÁN

#### You've reached the end of your free preview.

• Fall '14
• LeBaTranPhuong

{[ snackBarMessage ]}

###### "Before using Course Hero my grade was at 78%. By the end of the semester my grade was at 90%. I could not have done it without all the class material I found."
— Christopher R., University of Rhode Island '15, Course Hero Intern

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern