# Summary

• The binomial expansion of  is given by
• The general term  in the expansion of
• The expansion of
• The expansion of
• The middle term in the expansion of  term if n is even and and  term if n is odd
• The binomial coefficients of  are such that the binomial coefficient of 1st term = that of the (n+1)th term (last term), the binomial coefficient of the 2nd term = that of the nth term and so on
• Sum of binomial coefficients in
• Sum of alternate binomial coefficients in
• The constant term in the expansion of  is the term without the variables
•  will have the same coefficients & terms in its expansion as  with the alternate sings becoming negative (even terms are negative)