Question

an=7-4n.find common difference

Answer 1

Tn = 7 - 4n
=> a +(n-1)d = 3 + 4 - 4n
=> a +(n-1)d = 3 - 4(n-1)

Comparing both sides, we get

a= 3
d= - 4

Common difference = - 4


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