Let the positive numbers a,b,c,d be in A.P. Then, abc, abd, acd, bcd are

Mathematics · JEE Main · NTA Exams — Progression and Series

1. not in A.P./G.P./H.P.
2. in A.P.
3. in G.P.
4. in H.P.

Answer

(D) in H.P.

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