2.5 曲線の概形

1.

(a) $${x = \frac{1}{3}, y = \frac{1}{3}}$$ (b) $${x = 2, y = x+2}$$ (c) $${x = \pm 3, y = 0}$$

2.

(a) $x = 0$で垂直接線．(b) $x = 0$で垂直カスプ． =2.6zw =1(c) $x = 2$で垂直カスプ．