展开 ln(39/40)(x-100)

解答

展开

ln (\frac{39}{40}) (x - 100)

ln (\frac{39}{40}) x - 100 ln (\frac{39}{40})

求解步骤

ln (\frac{39}{40}) (x - 100)

使用分配律:

a (b - c) = ab - a c

a = ln (\frac{39}{40}), b = x, c = 100

= ln (\frac{39}{40}) x - ln (\frac{39}{40}) \cdot 100

= ln (\frac{39}{40}) x - 100 ln (\frac{39}{40})

e x p an d \frac{x ( x + 9 )}{6 z}

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