Q1 of 67 Page 65

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

3, -2, -7, -12, ……

Comparing the given arithmetic progression with general form,
We get, a = 3
and common difference = difference of two consecutive term
i.e. (–2) – (3) = -5, (-7) – (-2) = -5.


Hence, First term a = 3 and common arithmetic difference = -5.


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