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Coefficients by counting
Coefficients by counting
In 12 past-paper questions
What this skill is
Finding coefficients by counting ways to select terms from polynomial factors, including expansions such as
(
1
+
2
x
+
x
2
)
6
(1+2x+x^2)^6
(
1
+
2
x
+
x
2
)
6
.
