If a,b,c,d are positive numbers such that a,b,c are in A.P. and b,c,d are in H.P., then :

If a,b,c are in AP and b,c,d be in HP, then

If a,b,c,d,e be 5 numbers such that a,b,c are in A.P; b,c,d are in GP & c,d,e are in HP then prove that a,c,e are in GP

If a,b,c,in R^(+) , and a,b,c, d are in H.P. then

If a,b,c are in A.P and a^(2),b^(2),c^(2) are in H.P. then

If a,b,c are three distinct numbers in G.P., b,c,a are in A.P and a,bc, abc, in H.P then the possible value of b is

Let a,b,c,d and e be distinct positive numbers. If a,b,c and 1/c,1/d,1/e both are in A.P. And b,c,d are in G.P.then

If a, b, c and d are positive integers and a lt b lt c lt d such that a,b,c are in A.P. and b,c,d are in G.P. and d-a=30 . Then d-c is k then find the sum of the digits in k