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受欢迎的代数 >

-8000a^{-2}+1=0

解答

- 8000 a^{- 2} + 1 = 0

解答

a = 405, a = - 405

+1

十进制

a = 89.44271 \dots, a = - 89.44271 \dots

求解步骤

- 8000 a^{- 2} + 1 = 0

整理后得

- \frac{8000}{a ^{2}} + 1 = 0

在两边乘以

a^{2}

- 8000 + a^{2} = 0

解

- 8000 + a^{2} = 0 : a = 405, a = - 405

a = 405, a = - 405

验证解

找到无定义的点（奇点）:

a = 0

将不在定义域的点与解相综合:

a = 405, a = - 405

作图

流行的例子

\frac{28}{74} = \frac{33}{x}

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\frac{x + 2}{4} + \frac{3}{x + 2} = 7

(1000x-20000)/(1000x)=0.35

\frac{1000 x - 20000}{1000 x} = 0.35

\frac{3}{x} + 5 = \frac{7}{2}

solvefor a,b=-c/a

so l v e f or a, b = - \frac{c}{a}