If first term of ap is a and last term is b find common difference
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Here, A is first term of the A.P.
And B is last term.
I hope you are aware of Common difference, It's the difference between two consecutive terms of an A.P.
We know that,
An (Last term) = A + (n-1) d
After putting values, we get,
B = A + (n-1) d
B - A = (n-1) d
(B-A)/n-1 = d
Hence the common difference is B-A/n-1
And B is last term.
I hope you are aware of Common difference, It's the difference between two consecutive terms of an A.P.
We know that,
An (Last term) = A + (n-1) d
After putting values, we get,
B = A + (n-1) d
B - A = (n-1) d
(B-A)/n-1 = d
Hence the common difference is B-A/n-1
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