展开 (-7,1,-5)t+(3,-6,-8)(1-t)

解答

展开

(- 7, 1, - 5) t + (3, - 6, - 8) (1 - t)

- 7 t, 1, - 5 t + 3, 1 - 3, t - 6, 1 + 6, t - 8 \cdot 1 + 8 t

求解步骤

(- 7, 1, - 5) t + (3, - 6, - 8) (1 - t)

= (- 7 \cdot 1,, - 5) t + (3, - 6, - 8) (1 - t)

乘开

t (- 7, 1, - 5) : - 7 t, 1, - 5 t

= - 7 t, 1, - 5 t + (3, - 6, - 8) (1 - t)

乘开

(3, - 6, - 8) (1 - t) : 3, 1 - 3, t - 6, 1 + 6, t - 8 \cdot 1 + 8 t

= - 7 t, 1, - 5 t + 3, 1 - 3, t - 6, 1 + 6, t - 8 \cdot 1 + 8 t

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