Binomial Expansion Formula

In this expansion, we are dealing with the binomial expansion. The given expression is . The general term in the expansion of is given by: where , , and . The general term becomes: Simplifying: For the 6th term, substitute : Now, using the fact that the coefficient of the 6th term is equal to , we can solve for the principal value of . Solving the equation yields: Thus, the principal value of is .