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The 4th term of
is
.
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To find the 4th term of
, we can use the binomial theorem, which states that the
-th term of
is given by:
In this case,
,
, and
. For the 4th term,
.
Calculating
:
Calculating
:
Now substituting this value back into
:
Thus, the 4th term of
is
.
As for the fraction calculations you provided:
-
-
, which simplifies the expression and is a great way to practice your fraction manipulation!