If the sum of first n even natural no is 420, find the value of n
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Step-by-step explanation:
∴n=20. So, this is your answer. Note: We can also solve these types of problems by using the concept of arithmetic progression as the sum is given, the first term and common difference can be determined and the number of terms n is found. In this case Sn=420, a=2 and d=2.
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Step-by-step explanation:
The sum S of first n even natural numbers is given by the relation S = n(n + 1).
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