Question

If a,b,c are in AP and b,c,d are in HP,then a) ab=cd b) ad=bc c)ac=bd d)abcd=1

Answer 1

Answer:

b) ad =bc

Step-by-step explanation:

hence proved that ad=bc

please mark me as a brain list

Answer 2

Answer:

Step-by-step explanation:

sorry mate only b i know and i can help:

ad=bc

b:if a b c are in AP and B C D are in HP then prove that a d is equal to BC,

a b c are in AP,

=> 2b = a + c,

b c d  are in HP,

2/c  = 1/b + 1/d,

=> 2/c = (b + d)/bd,

=> 2bd = bc + cd,

putting 2b = a + c,

=> (a + c)d = bc + cd,

=> ad + cd = bc + cd,

=> ad = bc,

QED,

Proved,