Write the first three terms of the sequence whose nth term is .

2

Find the sum of the following geometric progressions 2, 6, 18, … to 7 terms.

3

Find the sum of the .

4

If nth term of an A.P. is 6n – 7 then write its common difference.

5

Find the ninth term of the G.P. 1, 4, 16, 64, ….