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Q : 3    For the following APs, write the first term and the common difference:

            (i)  \small 3,1,-1,-3,...

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Given AP series is

\small 3,1,-1,-3,...

Now, first term of this AP series is 3

Therefore,

First term of AP series (a) = 3

Now,

a_1=3 \ \ and \ \ a_2 = 1

And common difference (d)  = a_2-a_1 = 1-3 = -2

Therefore, first term and common difference is 3 and -2 respectively 

Posted by

Gautam harsolia

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