Let a, b and c be in GP with common ratio, r where `a !=0 and 0 lt r le (1)/(2)`. If 3a, 7b and 15 c are the first three terms of an AP, then the 4th term of this AP is

Let a,b and c be in G.P. with common ratio r, where a != 0 and 0 lt r le (1)/(2) . If 3a, 7b and 15c are the first three terms of an A.P., then the 4^(th) term of this A.P. is

In an AP,if the rth term is 2r-7, then,the 4th term will be

If the first three terms of an A.P. are b, c and 4b, then find the ratio of b and c.

If the 2nd, 5th and 9th term of A.P. are in G.P, then the common ratio of this GP is

If 3rd, 7th and 12th terms of an AP are three consecutive terms of a GP, then the common ratio of the GP is

If the first three terms of an A.P are b,c and 2b ,then find the ratio of b and c

If the first three terms of an A.P are b, c and 2b, then find the ratio of b and c

If the first three terms of an A.P are b, c and 2b, then find the ratio of b and c

If a b c are the p^(th),q^(th) and r^(th) terms of an AP then prove that sum a(q-r)=0

The first four terms of an AP are a, 9, 3a- b, 3a+b . The 2011 th term of an AP is