write the formula of sum of nth term of A.P and explain eat term ......
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sn = n/2 {2a + ( n - 1 ) d}
where sn is sum of nth term a is first term and d is difference
where sn is sum of nth term a is first term and d is difference
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(A)n=a+(n-1)d
(S)n=n/2[2a+(n-1)d]=n/2(a+
thats the formula of ap
(S)n=n/2[2a+(n-1)d]=n/2(a+
thats the formula of ap
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