展开 v(2,-1)f(1,-1)

解答

展开

v (2, - 1) f (1, - 1)

2 v f, 1, - 2 v f, 1 - 1 \cdot 1 \cdot v f, 1 \cdot 1

求解步骤

v (2, - 1) f (1, - 1)

= (2, - 1) (1, - 1) v f

乘开

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

= v f (2, 1, - 2, 1 - 1 \cdot 1, 1 \cdot 1)

乘开

v f (2, 1, - 2, 1 - 1 \cdot 1, 1 \cdot 1) : 2 v f, 1, - 2 v f, 1 - 1 \cdot 1 \cdot v f, 1 \cdot 1

= 2 v f, 1, - 2 v f, 1 - 1 \cdot 1 \cdot v f, 1 \cdot 1

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