向量運算與幾何意義測試
Quiz
•
Mathematics
•
12th Grade
•
Hard
白豐銘 白豐銘
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24 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
計算向量 A(2, 3) 和 B(4, -1) 的內積。
6
7
5
-2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
求向量 A(1, 2) 和 B(3, 4) 之間的夾角。
θ ≈ 0.7854 弧度
θ ≈ 1.5708 弧度
θ ≈ 0.6435 弧度
θ ≈ 1.0472 弧度
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
給定平面上兩條直線的法向量分別為 (2, 3) 和 (4, -1),求它們的夾角。
約 45.67 度
約 90.00 度
約 72.34 度
約 120.50 度
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
計算向量 A(5, 0) 在向量 B(1, 1) 上的正射影。
(0, 0)
(1, 1)
(3, 3)
(2.5, 2.5)
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
解釋向量內積的幾何意義。
向量內積只與向量的方向有關,與長度無關。
向量內積的幾何意義是兩個向量的長度乘以它們夾角的餘弦值。
向量內積是兩個向量的長度相加。
向量內積的幾何意義是兩個向量的長度乘以它們夾角的正弦值。
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
求向量 A(-1, 2) 和 B(2, 3) 的內積。
1
6
5
4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
計算向量 A(3, 4) 和 B(-4, 3) 的夾角。
60°
45°
90°
180°
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