IF `a_(1),a_(2),a_(3),"...."a_(10)` be in AP and `h_(1),h_(2),h_(3),"...."h_(10)` be in HP. If `a_(1)=h_(1)=2` and `a_(10)=h_(10)=3`, then find value of `a_(4)h_(7)`.

Let a_(1),a_(2),...,a_(10) be in A.P.and h_(1),h_(2),h_(10) be a_(1)=h_(1)=2 and a_(10)=h_(10)=3, then a_(-)4h_(7) is 2 b.3 c.5 d.6

Let a_(1),a_(2),a_(3)......... be in A.P. and h_(1),h_(2),h_(3)......, in H.P. If a_(1)=2=h_(1), and a_(30)=25=h_(30) then a_(7)h_(24)+a_(14)+a_(17)=

The numbers h_(1),h_(2),h_(3),h_(4),...,h_(10) are in harmonicprogression and a_(1),a_(2),...,a_(10) are in arithmetic progression.If a_(1)=h_(1)=3 and a_(7)=h_(7)=39, thenthe value of a_(4)xx h_(4) is

If a_(1),a_(2),a_(3),".....",a_(n) are in HP, than prove that a_(1)a_(2)+a_(2)a_(3)+a_(3)a_(4)+"....."+a_(n-1)a_(n)=(n-1)a_(1)a_(n)