The coefficient of the middle term in the expansion of

Question:

The coefficient of the middle term in the expansion of (1 + x)10 is ___________.

Solution:

In (1 + x)10

Tr +1 = 10Cr xr

Middle term is obtained when r = 5

i.e. Tr +1 = 10C5 x5

i.e. coefficient of middle term is 10C5

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