展开 x(1-ln(x))

解答

展开

x (1 - ln (x))

x - x ln (x)

求解步骤

x (1 - ln (x))

使用分配律:

a (b - c) = ab - a c

a = x, b = 1, c = ln (x)

= x \cdot 1 - x ln (x)

= 1 \cdot x - x ln (x)

乘以:

1 \cdot x = x

= x - x ln (x)

e x p an d \frac{- 2 x + 3 y}{3 ( y ^{2} - x )}

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