Q8. Find n, if the ratio of the fifth term from the beginning to the fifth term from the end in the expansion of is
Q4. If a and b are distinct integers, prove that is a factor of , whenever n is a positive integer.
[Hint: write and expand]
Q1. Find a, b and n in the expansion of if the first three terms of the expansion are 729, 7290 and 30375, respectively.