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面积 x=36-y^2,x=y^2-36

解答

面积

x = 36 - y^{2}, x = y^{2} - 36

解答

无解

求解步骤

对于

x = 36 - y^{2}

将

y

移到一边:

y = - x + 36, y = - - x + 36

对于

x = y^{2} - 36

将

y

移到一边:

y = x + 36, y = - x + 36

f_{1} (x) = - x + 36

f_{2} (x) = - - x + 36

要找到相交点，解

f_{i} (x) = f_{j} (x)

- x + 36 = - - x + 36 : x = 36

- x + 36 = x + 36 : x = 0

- x + 36 = - x + 36 : x \in R

无解

- - x + 36 = x + 36 : x \in R

无解

- - x + 36 = - x + 36 : x = 0

x + 36 = - x + 36 : x = - 36

曲线没有界限

= 无解

作图

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