Question

12. The relationship between a, b, c, d when a, b, care in A.P. and b, c, d are
in H.P.is
(a) ab = cd
(c) ad = bc
(b) ac = bd
(d) None of these​

Answer 1

Answer:

ab=cd

Step-by-step explanation:

if a n b cares for AP then obviously c n d will care for HP

Answer 2

Answer:

ab=cd

if a n b cares for ap than obviously C n d will care for HP