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Question
Find the common difference of an A.P. whose nth term is given by an = 6n – 5.
Solution
Given, nth term of A.P. is an = 6n – 5
For n = 1, a1 = 6(1) – 5 = 1
n = 2, a2 = 6(2) – 5 = 7
∴ Common difference,
d = a2 – a1
= 7 – 1
= 6
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