Sum of the first n odd numbers is ??
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To find the sum of first n odd numbers we can apply odd number theorem, it states that the sum of first n odd numbers is equal to the square of n. if we apply odd number theorem: sum of first 10 odd numbers = n * n = 10 * 10 = 100.
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2n-1
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1+3+5+7+..............+(2n-1)
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