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Question
Choose the correct alternative answer for the following question .
First four terms of an A.P. are ....., whose first term is –2 and common difference is –2.
Options
-2,0,2,4
-2,4 ,-8,16
-2, -4,-6,-8
-2, -4 ,-8,-16
Solution
It is given that,
First term (a) = –2
Common difference (d) = –2
Second term = a + d = –2 + (–2) = –4
Third term = a + 2d = –2 + 2(–2) = –6
Fourth term = a + 3d = –2 + 3(–2) = –8
Thus, first four terms of the A.P. are –2, –4, –6, –8
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