If $a, b, c, d$ are in GP, then

a c = c d

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a b = c d

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b c = \sqrt{a d}

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a d = b c

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Solution

The correct option is A $a d = b c$
Given $a, b, c, d$ are in GP
$\Rightarrow \frac{b}{a} = \frac{c}{b} = \frac{d}{c}$
$\Rightarrow b c = a d$
Hence, option 'D' is correct.

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Similar questions

In the given figure, if AD = BC and AD || BC, then

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