導関数，微分係数
y
′
=
(
x
−
3
)
(
3
x
+
1
)
(
x
2
+
1
)
2
(接線の傾き)
JSXGraph v1.2.2 Copyright (C) see https://jsxgraph.org
5
−5
2
4
−2
−4
0,0
–
o
+
←
↓
↑
→
x
y
P'
y
=
4
−
3
x
x
2
+
1
JSXGraph v1.2.2 Copyright (C) see https://jsxgraph.org
5
−5
2
4
−2
−4
0,0
–
o
+
←
↓
↑
→
x
y
p = 0.00
P