Test with accessible formulae
Which is the correct identity?
2
+
3
=
5
2
⋅
3
=
6
3
6
+
9
=
1
2
+
1
3
Which is the wrong identity?
(
a
+
b
)
n
=
∑
k
=
0
n
n
k
a
k
b
n
-
k
lim
n
→
+
∞
1
x
=
+
∞
∫
x
d
x
=
x
2
2
+
C
,
C
∈
R
Accessible formulae
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