Sum of first nth odd natural numbers
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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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Answer:81 Step-by-step explanation: N² is the formula for these types of sum! no.of odd numbers = 9 odd numbers. N = 9 9² =81 Checking:) 1+3+5+7+11+13+15+17+19 = 81
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