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受欢迎的代数 >

|(1-2x)/x |=4

解答

\frac{1 - 2 x}{x} = 4

解答

x = - \frac{1}{2}, x = \frac{1}{6}

+1

十进制

x = - 0.5, x = 0.16666 \dots

求解步骤

\frac{1 - 2 x}{x} = 4

化简

\frac{1 - 2 x}{x} : \frac{∣ 1 - 2 x ∣}{∣ x ∣}

\frac{∣ 1 - 2 x ∣}{∣ x ∣} = 4

在两边乘以

∣ x ∣

∣ 1 - 2 x ∣ = 4 ∣ x ∣

解

∣ 1 - 2 x ∣ = 4 ∣ x ∣ : x = - \frac{1}{2} or x = \frac{1}{6}

x = - \frac{1}{2}, x = \frac{1}{6}

验证解

找到无定义的点（奇点）:

x = 0

将不在定义域的点与解相综合:

x = - \frac{1}{2}, x = \frac{1}{6}

作图

流行的例子

\frac{9}{x} = 3

1/(x+3)+4=(21)/(x+3)

\frac{1}{x + 3} + 4 = \frac{21}{x + 3}

135=(180(n-2))/n

135 = \frac{180 ( n - 2 )}{n}

solvefor m,a= f/m

so l v e f or m, a = \frac{f}{m}

3x^2-6x-4=-2/(x+3)+1

3 x^{2} - 6 x - 4 = - \frac{2}{x + 3} + 1