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受欢迎的代数 >

1/(x-3)=1-(2x-7)/(x-3)

解答

\frac{1}{x - 3} = 1 - \frac{2 x - 7}{x - 3}

解答

无解

求解步骤

\frac{1}{x - 3} = 1 - \frac{2 x - 7}{x - 3}

在两边乘以

x - 3

1 = x - 3 - (2 x - 7)

交换两边

x - 3 - (2 x - 7) = 1

将

3

到右边

x - (2 x - 7) = 4

展开

x - (2 x - 7) : - x + 7

- x + 7 = 4

将

7

到右边

- x = - 3

两边除以

- 1

x = 3

验证解

找到无定义的点（奇点）:

x = 3

因为方程对以下值无定义:

3

无解

作图

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