The nth term of an AP is 7-4n.find its common difference.
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Tn = 7 - 4n
=> a+ (n-1) d = 3 + 4 - 4n
=> a+(n-1)d = 3 - 4(n-1)
On Comparing both sides, we get
First term = 3
Common difference = -4
=> a+ (n-1) d = 3 + 4 - 4n
=> a+(n-1)d = 3 - 4(n-1)
On Comparing both sides, we get
First term = 3
Common difference = -4
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