1, -2, -5, -8, ...
The common difference of the given A.P is .

-1

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-3

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Solution

The correct option is C -3
The given A.P is
1, -2, -5, -8, ...

The common difference of an AP is the difference between any two consecutive terms.

Hence, the common difference of the given AP = (-2) - (1) = - 3

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