展开 (f\circ g)(3x-3)

解答

展开

(f \circ g) (3 x - 3)

3 \circ f gx - 3 \circ f g

求解步骤

(f \circ g) (3 x - 3)

= (\circ f g) (3 x - 3)

使用分配律:

a (b - c) = ab - a c

a = (f \circ g), b = 3 x, c = 3

= (f \circ g) \cdot 3 x - (f \circ g) \cdot 3

= 3 x (\circ f g) - 3 (\circ f g)

去除括号:

(a) = a

= 3 \circ f gx - 3 \circ f g

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