The first three periods are

In four numbers given the first three numbers are in G.P. and the last three numbers are in A.P. with commor, difference 6. If the first and last numbers are equal then the are

The first three terms of a sequence are 3,-1,-1 . The next terms are

The first three terms of an A.P. are 3y -1, 3y + 5, and 5y+ 1 . Find y.

If x ,2x+2 and 3x+3 are the first three terms of a G.P., then the fourth term is

In a Geometric progression the sum of first three terms is 14 and the sum of next three terms of it is 112. Find the Geometric progression.

Write first three terms of the sequence a_n=(n-3)/(4) .

The ratio of radii of the first three Bohr orbits of H-atom is :