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Let the positive numbers a, b, c, d be in AP. Then abc, abd, acd, bcd are (a) not in AP/ GP/ HP (b) in AP (c) in GP (d) in HP

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

(a) not in AP/ GP/ HP 

(b) in AP 

(c) in GP 

(d) in HP

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Best answer

The correct option is (d) in HP

Explanation:

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