
BẢNG ĐÁP ÁN
Quiz
•
Mathematics
•
3rd Grade
•
Hard
nông nga
Used 2+ times
FREE Resource
46 questions
Show all answers
1.
OPEN ENDED QUESTION
3 mins • 1 pt
Trong không gian Oxyz, mặt phẳng : 2 3 2 0 P x z- + = có một v
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2.
OPEN ENDED QUESTION
3 mins • 1 pt
Mặt cầu tâm (1; 0; 1), bán kính bằng 3 có phương trình là 2x + 3y + z - 9 = 0. Trong không gian Oxyz, mặt phẳng 2x + 3z - 2 = 0 có một vectơ pháp tuyến là (2; 0; 3).
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3.
OPEN ENDED QUESTION
3 mins • 1 pt
Cho hai số phức z1 = -5i và z2 = 2 + 3i. Số phức z = z1z2 bằng 7 - 30i.
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4.
OPEN ENDED QUESTION
3 mins • 1 pt
Hình phẳng D giới hạn bởi đồ thị hàm số y = x^2 - x và trục Ox. Thể tích khối tròn xoay được tạo thành khi quay D quanh trục Ox bằng 16/15π.
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5.
OPEN ENDED QUESTION
3 mins • 1 pt
Họ tất cả các nguyên hàm của hàm số f(x) = x^2 + x là C(x) = x^3/3 + x^2/2 + C.
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6.
OPEN ENDED QUESTION
3 mins • 1 pt
Diện tích hình phẳng giới hạn bởi đồ thị của các hàm số y = x^2 và y = x và các đường thẳng x = 0, x = 1 bằng 0.
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7.
OPEN ENDED QUESTION
3 mins • 1 pt
Câu 23: Cho số phức z = x + yi thỏa mãn 2z^2 + 4i = -3. Giá trị của 3xy bằng
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