$$$\frac{\ln\left(4^{y}\right)}{\ln\left(5\right)}$$$ 的积分
您的输入
求$$$\int \frac{y \ln\left(4\right)}{\ln\left(5\right)}\, dy$$$。
解答
输入已重写为：$$$\int{\frac{\ln{\left(4^{y} \right)}}{\ln{\left(5 \right)}} d y}=\int{\frac{y \ln{\left(4 \right)}}{\ln{\left(5 \right)}} d y}$$$。
对 $$$c=\frac{\ln{\left(4 \right)}}{\ln{\left(5 \right)}}$$$ 和 $$$f{\left(y \right)} = y$$$ 应用常数倍法则 $$$\int c f{\left(y \right)}\, dy = c \int f{\left(y \right)}\, dy$$$：
$${\color{red}{\int{\frac{y \ln{\left(4 \right)}}{\ln{\left(5 \right)}} d y}}} = {\color{red}{\frac{\ln{\left(4 \right)} \int{y d y}}{\ln{\left(5 \right)}}}}$$
应用幂法则 $$$\int y^{n}\, dy = \frac{y^{n + 1}}{n + 1}$$$ $$$\left(n \neq -1 \right)$$$，其中 $$$n=1$$$：
$$\frac{\ln{\left(4 \right)} {\color{red}{\int{y d y}}}}{\ln{\left(5 \right)}}=\frac{\ln{\left(4 \right)} {\color{red}{\frac{y^{1 + 1}}{1 + 1}}}}{\ln{\left(5 \right)}}=\frac{\ln{\left(4 \right)} {\color{red}{\left(\frac{y^{2}}{2}\right)}}}{\ln{\left(5 \right)}}$$
因此，
$$\int{\frac{y \ln{\left(4 \right)}}{\ln{\left(5 \right)}} d y} = \frac{y^{2} \ln{\left(4 \right)}}{2 \ln{\left(5 \right)}}$$
化简：
$$\int{\frac{y \ln{\left(4 \right)}}{\ln{\left(5 \right)}} d y} = \frac{y^{2} \ln{\left(2 \right)}}{\ln{\left(5 \right)}}$$
加上积分常数：
$$\int{\frac{y \ln{\left(4 \right)}}{\ln{\left(5 \right)}} d y} = \frac{y^{2} \ln{\left(2 \right)}}{\ln{\left(5 \right)}}+C$$
答案
$$$\int \frac{y \ln\left(4\right)}{\ln\left(5\right)}\, dy = \frac{y^{2} \ln\left(2\right)}{\ln\left(5\right)} + C$$$A