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LMT
2021 LMT Spring
B14
B14
Part of
2021 LMT Spring
Problems
(1)
2021 Spring LMT Division B Problem 14
Source:
1/22/2022
In the expansion of
(
2
x
+
3
y
)
20
(2x +3y)^{20}
(
2
x
+
3
y
)
20
, find the number of coefficients divisible by
144
144
144
.Proposed by Hannah Shen
combinatorics