展开 (4-x)ln(x+5)

解答

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(4 - x) ln (x + 5)

4 ln (x + 5) - x ln (x + 5)

求解步骤

(4 - x) ln (x + 5)

= ln (x + 5) (4 - x)

使用分配律:

a (b - c) = ab - a c

a = ln (x + 5), b = 4, c = x

= ln (x + 5) \cdot 4 - ln (x + 5) x

= 4 ln (x + 5) - x ln (x + 5)

s im pl i f y (x - 2 + 1)^{2}

e x p an d \frac{( s + 2 )}{s ( s + 1 ) ( s + 3 ) ( s + 5 )}

s im pl i f y (7 + \frac{i}{n})^{2}

e x p an d \frac{k}{z - a z + b ( 1 - a )}

e x p an d e^{- 1 - 11} (2 + 211)