Find the first term a and the common difference d for the following arithmetic progressions -
-7, -9, -11, -13, ……
Comparing the given arithmetic progression with general form,
We get, a = -7
and common difference = difference of two consecutive term
i.e. (–9) – (-7) = 2, (-11) – (-9) = -2.
Hence, First term a = -7 and common arithmetic difference = -2.
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