if n arithmetic mean inserted between a and b than common deference is
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If there are "n" Arithmetic Means inserted between "a" and "b", then we understand that there is a total of (n + 2) Terms in an Arithmetic Progression ( AP ). Sn=(n2)(a1+an) , where a1 is the First Term and an is the Last Term of the AP.
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In arithmetic progression, if no. are a and b,then common difference(denoted by d) = b-a
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