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Mathematics
Mathematics
Problem
In the expansion of
(
2
+
3
x
)
7
(2+3x)^{7}
(
2
+
3
x
)
7
, find the term that is numerically greatest when
x
=
1
2
x=\dfrac12
x
=
2
1
. State the corresponding value of
r
r
r
and write that term.
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