if a=2,n=5 Sn=90 in an AP find d
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Given:-
- First term = a = 2
- No. of terms = n = 5
- Sum of terms = Sn = 90
To find:-
- Value of d (common difference).
Solution:-
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In AP, there are three main terms, which are known as:
- Common difference (d)
- An (nth term of AP)
- Sum of the first nth terms (Sn)
These three terms represents the characteristics of AP.
Common difference (d)
We can find the value of d, by subtracting 1st term from the 2nd term of AP.
Like, AP = 2,4,6,8
Common difference will be, 4 - 2 = 2
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