$\"\"$

Binomial theorem :

$\"\"$

Where $\"\"$ , $\"\"$ are real numbers and $\"\"$ is any positive integer.

$\"\"$

The expression is $\"\"$ .

By using binomial theorem :

$\"\"$

In the expansion, the sixth term is $\"\"$ .

$\"\"$

Therefore, the coefficient of the sixth term in the expansion of $\"\"$ is $\"\"$ .

$\"\"$

The coefficient of the sixth term in the expansion of $\"\"$ is $\"\"$ .