Sumithiidn
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If the nth term of an AP is (7-4n) then its common difference is​

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SalmonWorldTopperidn

Given nth term of an AP = 7-4n

Put n = 1 then t1 = 7-4(1) = 7-4 = 3

Put n = 2 then t2 =7-4(2) = 7-8 = -1

Common difference = t2-t1 = -1-3 = -4

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