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in Binomial Theorem by (44.0k points)
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Find the middle term(s) in the expansion of (3x2/2 - 1/3x)9

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Here, a = 3x2/2, b = -1/3x, n = 9.

Now, n is odd.

\(\frac{n+1}2=\frac{9+1}2=5,\) \(\frac{n+3}2=\frac{9+3}2=6\)

Middle terms are t5 and t6, for which r = 4 and r = 5 respectively.

We have tr+1 = nCran-rbr

and 

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