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Question
Write the correct number in the given boxes from the following A. P.
–3, –8, –13, –18,...
Here t3 = 
, t2 = 
, t4 =
, t1 = 
,
t2 – t1 = 
, t3 – t2 = 
∴ a = 
, d = 
Solution
–3, –8, –13, –18,...
Here t3 = 
, t2 = 
, t4 = 
, t1 = 
,
t2 – t1 = 
, t3 – t2 = 
∴ a = 
, d = 
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