Loading [MathJax]/jax/output/CommonHTML/jax.js
∇
⋅
B
=
0
3
4
π
√
4
⋅
x
2
12
lim
n
→
∞
n
∑
k
=
1
1
k
2
=
π
2
6
e
i
π
+
1
=
0
∫
x
2
d
x
=
1
3
x
3
∴
∫
1
0
x
2
d
x
=
1
3