All formulas of chapter A.P
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1: s=n(a+l)/2
2:if a,b,c are in ap then - b=(a+c)/2
3:1+2+3+------------+n=n(n+1)/2
4: 1^2+2^2+3^2-----------+n^2=n(n+1)(2n+1)/6
5: 1^3+2^3----------+n^3=n^2(n+1)^2/4
2:if a,b,c are in ap then - b=(a+c)/2
3:1+2+3+------------+n=n(n+1)/2
4: 1^2+2^2+3^2-----------+n^2=n(n+1)(2n+1)/6
5: 1^3+2^3----------+n^3=n^2(n+1)^2/4
Anonymous:
could u plz tell me what s n etc stands for??
hi angelkajal i am too late to give my answer , truely i am not a regular user. there is your answe-
that's okay
here is your answer-
n means- the last term of the problem, such as-
1+2+3+4+5---------+n . and s- means total of the problem,
such as- s=1+2+3+4+-----+n=n(n+1)/2
My examination is going to start from the next week.my sister, have a good day.My mail account- [email protected]. bye bye
Thank you
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