三角学示例

{log}_{9} (\frac{x y}{5})

$\log_{9} (\frac{x y}{5})$

解题步骤 1

将

{log}_{9} (\frac{x y}{5})

$\log_{9} (\frac{x y}{5})$ 重写为

{log}_{9} (x y) - {log}_{9} (5)

$\log_{9} (x y) - \log_{9} (5)$ 。

{log}_{9} (x y) - {log}_{9} (5)

$\log_{9} (x y) - \log_{9} (5)$

解题步骤 2

将

{log}_{9} (x y)

$\log_{9} (x y)$ 重写为

{log}_{9} (x) + {log}_{9} (y)

$\log_{9} (x) + \log_{9} (y)$ 。

{log}_{9} (x) + {log}_{9} (y) - {log}_{9} (5)

$\log_{9} (x) + \log_{9} (y) - \log_{9} (5)$

⎡ ⎢ ⎣ \begin{matrix} x^{2} & \frac{1}{2} \sqrt{π} & \int x d x \end{matrix} ⎤ ⎥ ⎦

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$