If terms 9- x- 21 form nbsp-an arithmetic progression- then nbsp-the value of x is - 11-17-13-15-

The correct option is D 15 15 ...

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Three and Four Terms in an AP

If terms 9, x...

Question

If terms 9, x, 21 form an arithmetic progression, then the value of x is ____.

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Similar questions

If terms 9, x, 21 form an arithmetic progression, then the value of x is ____.

If the arithmetic mean of $7, 9, 11, 13, x, 21$ is $13$ , find the value of $x$ .

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