Let the positive numbers a, b, c, d be in A.P | vedclass

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(D) Given that $a, b, c, d$ are in $A.P.$Dividing each term by the product $abcd$,we get:$\frac{a}{abcd}, \frac{b}{abcd}, \frac{c}{abcd}, \frac{d}{abc

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In $H.P.$

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(D) Given that $a, b, c, d$ are in $A.P.$Dividing each term by the product $abcd$,we get:$\frac{a}{abcd}, \frac{b}{abcd}, \frac{c}{abcd}, \frac{d}{abcd}$ are in $A.P.$This simplifies to:$\frac{1}{bcd}, \frac{1}{acd}, \frac{1}{abd}, \frac{1}{abc}$ are in $A.P.$By the definition of $H.P.$,the reciprocals of terms in $A.P.$ are in $H.P.$Therefore,$bcd, acd, abd, abc$ are in $H.P.$Reversing the order,$abc, abd, acd, bcd$ are also in $H.P.$

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

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