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受欢迎的代数 >

1-(81)/(x^2)=0

解答

1 - \frac{81}{x ^{2}} = 0

解答

x = 9, x = - 9

求解步骤

1 - \frac{81}{x ^{2}} = 0

在两边乘以

x^{2}

x^{2} - 81 = 0

解

x^{2} - 81 = 0 : x = 9, x = - 9

x = 9, x = - 9

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 = 9, x = - 9

作图

流行的例子

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

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

\frac{1}{2 ( 2 y + 4 )} = - 6

solvefor x,x^{-3}=0

so l v e f or x, x^{- 3} = 0

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

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

1.85= 1/(2a(0.73s)^2)

1.85 = \frac{1}{2 a ( 0.73 s ) ^{2}}