Q1 of 67 Page 65

Find the first term a and the common difference d for the following arithmetic progressions -

3, 1, -1, -3, ……

Comparing the given arithmetic progression with general form,
We get, a = 3
and common difference = difference of two consecutive term
i.e. (1) – (3) = -2, (-1) – (1) = -2.


Hence, First term a = 3 and common arithmetic difference = -2.


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