A) \[ab=cd\]
B) \[ad=bc\]
C) \[ac=bd\]
D) \[abcd=1\]
Correct Answer: B
Solution :
Given that \[a,\ b,\ c\] in A.P. and \[b,\ c,\ d\] in H.P. So, \[2b=a+c\] and \[c=\frac{2bd}{b+d}\] \[\Rightarrow \]\[c(b+d)=2bd=(a+c)d\]\[\Rightarrow \]\[bc=ad\].You need to login to perform this action.
You will be redirected in
3 sec