Identify the common difference of the given AP: a, a+d, a+2d, a+3d, ...

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-d

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Solution

The correct option is C
d

In an AP, common difference is the difference between any two consecutive terms.

In the given AP,

First term = a,
Second term = a+d,
Third term = a+2d
$∴$ Common difference = 2nd term – 1st term
= (a+d) – (a)
= d

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Identify the common difference of the given AP: a, a+d, a+2d, a+3d, ...

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