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受欢迎的代数 >

a(x)=-(x^3)/(x+1)

解答

a (x) = - \frac{x ^{3}}{x + 1}

解答

x = 0, x = \frac{- a + a ^{2} - 4 a}{2}, x = \frac{- a - a ^{2} - 4 a}{2}

求解步骤

a (x) = - \frac{x ^{3}}{x + 1}

在两边乘以

x + 1

a x (x + 1) = - x^{3}

解

a x (x + 1) = - x^{3} : x = 0, x = \frac{- a + a ^{2} - 4 a}{2}, x = \frac{- a - a ^{2} - 4 a}{2}

x = 0, x = \frac{- a + a ^{2} - 4 a}{2}, x = \frac{- a - a ^{2} - 4 a}{2}

验证解

找到无定义的点（奇点）:

x = - 1

将不在定义域的点与解相综合:

x = 0, x = \frac{- a + a ^{2} - 4 a}{2}, x = \frac{- a - a ^{2} - 4 a}{2}

作图

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