導関数，微分係数
y
′
=
−
2
x
e
−
x
2
(接線の傾き)
JSXGraph v1.2.2 Copyright (C) see https://jsxgraph.org
5
−5
0.5
1
1.5
−0.5
−1
−1.5
0,0
–
o
+
←
↓
↑
→
x
y
P'
y
=
e
−
x
2
JSXGraph v1.2.2 Copyright (C) see https://jsxgraph.org
5
−5
0.5
1
1.5
−0.5
−1
−1.5
0,0
–
o
+
←
↓
↑
→
x
y
p = 0.00
P