find the sum of the series 1+2+3+......+60
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The first term, a = 1
The common difference, d = 2 - 1 = 1
Total number of terms, n = 60
Sn = n/2 × ( a + Tn)
Sn = 60/2 × ( 1 + 60)
Sn = 30 × 61 = 1830 Ans.
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Urs solution is in the attachment.
Hope it will help u !
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