Violet
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Khắc phục hiện tượng không xuất hiện menu Bộ công cụ Violet trên PowerPoint và Word

12099162 Kính chào các thầy, cô. Khi cài đặt phần mềm , trên PowerPoint và Word sẽ mặc định xuất hiện menu Bộ công cụ Violet để thầy, cô có thể sử dụng các tính năng đặc biệt của phần mềm ngay trên PowerPoint và Word. Tuy nhiên sau khi cài đặt phần mềm , với nhiều máy tính sẽ...
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Người gửi: Trần Trọng Tuấn
Ngày gửi: 07h:50' 18-12-2017
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Họ và tên: .............................................. Lớp: ............Trường: ............................................
KIỂM TRA 1 TIẾT
1.Thực hiện phép tính: (2,5 điểm) a) 
b) 
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2.Tìm x: (1,5 điểm)
a) 
b)  ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... ...........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

3.Thời gian của ô tô, xe đạp, xe máy chạy trên cùng một quãng đường lần lượt là 3 giờ, 6 giờ, 4 giờ. Tính quãng đường này dài bao nhiêu km, biết cả 3 phương tiện này xuất phát cùng nhau và vận tốc của xe máy ít hơn vận tốc của ô tô 15 km/h. (1,5 điểm)
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4.Cho hàm số y = f(x) = | x2 + 1 | – 3: (1,5 điểm) a) Tính f(2), f(-3).
b) Tìm x biết f(x) = 14.
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5.Cho ∆ABC có AB < AC. Trên AC cho I để AB = AI. Tia phân giác A cắt BC tại D. (3 điểm)
a) Chứng minh DB = DI.
b) AB, DI cắt nhau tại M. Chứng minh BMD = ICD.
c) Gọi N là trung điểm của MC. Chứng minh A, D, N thẳng hàng.
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6*.Có bao nhiêu cách chứng minh 3 điểm thẳng hàng? Kể tên. (+1 điểm)
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