展开 A(3,0,-1)B(0,-2,0)

解答

展开

A (3, 0, - 1) B (0, - 2, 0)

3 A B, 0, 0, - 3 A B, 0, 2, 0 - 1 \cdot 0 \cdot A B, 1 \cdot 2, 0

求解步骤

A (3, 0, - 1) B (0, - 2, 0)

= (3 \cdot 0,, - 1) (0, - 2 \cdot 0,) A B

乘开

(3, 0, - 1) (0, - 2, 0) : 3, 0, 0, - 3, 0, 2, 0 - 1 \cdot 0, 1 \cdot 2, 0

= A B (3, 0, 0, - 3, 0, 2, 0 - 1 \cdot 0, 1 \cdot 2, 0)

乘开

A B (3, 0, 0, - 3, 0, 2, 0 - 1 \cdot 0, 1 \cdot 2, 0) : 3 A B, 0, 0, - 3 A B, 0, 2, 0 - 1 \cdot 0 \cdot A B, 1 \cdot 2, 0

= 3 A B, 0, 0, - 3 A B, 0, 2, 0 - 1 \cdot 0 \cdot A B, 1 \cdot 2, 0

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