向量的基本概念與應用 Flashcards: 4 Cards (Grade 12)

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4 questions

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1.

FLASHCARD QUESTION

Front

向量 $\mathbf{a}=(5,12)$ 的長度是多少？

Back

13

2.

FLASHCARD QUESTION

Front

向量 $\mathbf{a} = (2, -3)$ 和向量 $\mathbf{b} = (-1, 4)$ 的和是多少？

Back

(1, 1)

3.

FLASHCARD QUESTION

Front

如果向量 $\mathbf{a} = (1, 2)$ 和向量 $\mathbf{b} = (3, 4)$ ，則 $\mathbf{a} \cdot \mathbf{b}$ 的內積是多少？

Back

11

4.

FLASHCARD QUESTION

Front

若向量 $\mathbf{a} = (x, y)$ ，且 $|\mathbf{a}| = 5$ ，請問 $x^2 + y^2$ 的值是多少？

Back

25

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