If `2,h_1,h_2,...h_(20),5` are in H.P, `2,a_1,a_2,...a_(20),5` are in A.P and `2,g_1,g_2,...g_(20),5` are in G.P and `L=prod_(i=1)^(20) a_ih_ig_i` then `(log_(10)L)/10=`

If x_1,x_2 …,x_(20) are in H.P and x_1,2,x_(20) are in G.P then Sigma_(r=1)^(19)x_rr_(x+1)

If x_1,x_2 …,x_(20) are in H.P and x_1,2,x_(20) are in G.P then Sigma_(r=1)^(19)x_rr_(x+1)

Let a_1, a_2, ,a_(10) be in A.P. and h_1, h_2, h_(10) be in H.P. If a_1=h_1=2a n da_(10)=h_(10)=3,t h e na_4h_7 is

a_1 , a_2 , ......a_(10) are in G.P a_7/a_5=25 Find a_(10)/a_8

If a,A_(1),A_(2),b are in A.P., a,G_(1),G_(2),b are in G.P. and a, H_(1),H_(2),b are in H.P., then the value of G_(1)G_(2)(H_(1)+H_(2))-H_(1)H_(2)(A_(1)+A_(2)) is

if a,a_1,a_2,a_3,.........,a_(2n),b are in A.P. and a,g_1,g_2,............g_(2n) ,b are in G.P. and h is H.M. of a,b then (a_1+a_(2n))/(g_1*g_(2n))+(a_2+a_(2n-1))/(g_2*g_(2n-1))+............+(a_n+a_(n+1))/(g_n*g_(n+1)) is equal

If a,a_(1),a_(2),...,a_(10),b are in A.P.and a,g_(1),g_(2),...,g_(10),b are in G.P.and h is the H.M.betweein a and b,then (a_(1)+a_(2)+...+a_(10))/(g_(1)g_(10))+(a_(2)+a_(3)+...+a_(9))/(g_(2)g_(9))+......+(a_(5)+a_(6))/(g_(5)g_(6))