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Question
Choose the correct alternative answer for the following question .
The sequence –10, –6, –2, 2,...
Options
is an A.P.,Reason d = -16
is an A.P Reason d = 4
is an A.P.,Reason d = -4
is not an A.P.
Solution
The given sequence is –10, –6, –2, 2,...
Here,
First term (a) = a1 = –10
Second term = a2 = –6
Third term = a3 = –2
Common difference (d) = a2 – a1 = –6 – (–10) = 4
= a3 – a2 = –2 – (–6) = 4
Since, a2 – a1 = a3 – a2
Thus, the given sequence is an A.P.
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