Giới thiệu về bản thân
phải helo helo con dog
Đặt
A
=
4
(
3
2
+
1
)
(
3
4
+
1
)
(
3
8
+
1
)
(
3
16
+
1
)
𝐴
=
4
(
3
2
+
1
)
(
3
4
+
1
)
(
3
8
+
1
)
(
3
16
+
1
)
.
Nhân cả hai vế với 2, ta được
2
A
=
8
(
3
2
+
1
)
(
3
4
+
1
)
(
3
8
+
1
)
(
3
16
+
1
)
2
𝐴
=
8
(
3
2
+
1
)
(
3
4
+
1
)
(
3
8
+
1
)
(
3
16
+
1
)
.
Ta có:
2
A
=
8
(
3
2
+
1
)
(
3
4
+
1
)
(
3
8
+
1
)
(
3
16
+
1
)
2
A
=
(
3
2
−
1
)
(
3
2
+
1
)
(
3
4
+
1
)
(
3
8
+
1
)
(
3
16
+
1
)
2
A
=
(
3
4
−
1
)
(
3
4
+
1
)
(
3
8
+
1
)
(
3
16
+
1
)
2
A
=
(
3
8
−
1
)
(
3
8
+
1
)
(
3
16
+
1
)
2
A
=
(
3
16
−
1
)
(
3
16
+
1
)
2
A
=
3
32
−
1
A
=
3
32
−
1
2
2
𝐴
=
8
(
3
2
+
1
)
(
3
4
+
1
)
(
3
8
+
1
)
(
3
16
+
1
)
2
𝐴
=
(
3
2
−
1
)
(
3
2
+
1
)
(
3
4
+
1
)
(
3
8
+
1
)
(
3
16
+
1
)
2
𝐴
=
(
3
4
−
1
)
(
3
4
+
1
)
(
3
8
+
1
)
(
3
16
+
1
)
2
𝐴
=
(
3
8
−
1
)
(
3
8
+
1
)
(
3
16
+
1
)
2
𝐴
=
(
3
16
−
1
)
(
3
16
+
1
)
2
𝐴
=
3
32
−
1
𝐴
=
3
32
−
1
2
Vậy
4
(
3
2
+
1
)
(
3
4
+
1
)
(
3
8
+
1
)
(
3
16
+
1
)
=
3
32
−
1
2
4
(
3
2
+
1
)
(
3
4
+
1
)
(
3
8
+
1
)
(
3
16
+
1
)
=
3
32
−
1
2
.
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