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Let the positive numbers a , b , c , d b...

Let the positive numbers `a , b , c , d` be in AP. Then `a b c ,a b d ,a c d ,b c d` are

A

not in AP/GP/HP

B

in AP

C

in GP

D

in HP

Text Solution

Verified by Experts

The correct Answer is:
D
Since, a, b, c, d are in AP
`rArr (a)/(abcd), (b)/(abcd),(c)/(abcd),(d)/(abcd)` are in AP
`rArr (1)/(bcd), (1)/(cda), (1)/(abd), (1)/(abc)` are in AP
`rArr bcd, cda, abd, abc` are in HP
`rArr abc, abd, cda, bcd` are in HP
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