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1+2+3+4..... Find the ans.. using this formula n(n+1)/2

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n (a + l) / 2 where n = number of terms, a = first term and l = last term or n (2a + (n-1) d) / 2 where a = 1st term, n = total number of terms and d = common difference
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Trainer

please refer: http://en.wikipedia.org/wiki/1_%2B_2_%2B_3_%2B_4_%2B_%E2%8B%AF
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Engineer

yes that is correct as it is an arithmetic series but the answer will be infinity
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