[" 18.If three positive numbers "a,b,c" are in A.P.and "],[(1)/(a^(2)),(1)/(b^(2)),(1)/(c^(2))" also in A.P.,then "]

If three positive unequal numbers a,b,c are in H.P.,then

If three positive unequal numbers a, b, c are in H.P., then

Three numbers a,b and c are in the A.P if

If distinct positive number a , b, c, are in G.P. and (1)/(a-b), (1)/(c-a),(1)/(b-c) are in A.P. , then value of a + ab + c is equal to

If a,b,c are distinct real numbers such that a, b,c are in A.P.and a^(2),b^(2),c^(2) are in H.P, then

If three positive numbers a,b,c are in A.P ad tan^(-1)a,tan^(-1)b,tan^(-1)c are also in A.P such that b lt 1 and ac lt 1 then

If three positive numbers a,b,c are in A.P ad tan^(-1)a,tan^(-1)b,tan^(-1)c are also in A.P such that b lt 1 and ac lt 1 then

If three equal positive numbes a,b,c are in G.P,then show that a+c>2b

If a,b,c are in A.P.and a^(2),b^(2),c^(2) are in G.P.such that a lt b lt c and a+b+c=3/2 then a=