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Sum = n/2[2Xa1+(n-1)d] where n is last number, a1 is the first number & d is the common difference between the numbers, here d=2 for the even /odd numbers. Sum = n/2 [2Xa1+(n-1)2]

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15y ago
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13y ago

The sum of the first n even number is n*(2+2n)/2 = n(n+1)

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Q: What is the formula to find sum of n even numbers?
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Related questions

What is formula to find sum of n even numbers?

There is no formula that will sum n even numbers without further qualifications: for example, n even numbers in a sequence.


What is the formula to find out the sum of first n even numbers?

n*(n+1)


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The sum of the first 20 even numbers... is 110


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The sum of the first 10 even numbers is 110.


What is the formula of adding all even numbers?

You cannot. There are infinitely many even numbers and their sum is not convergent.


Formula for finding the average?

To find the average of n numbers, take the sum of the numbers and divide by n.


Can you find any two even numbers whose sum is not an even number?

no


What is the formula to find sum of first n prime numbers?

there isn't a formula for it.you need to calculate it by your own.


What is the sum of the fist 40 even numbers?

You can use the formula for the sum of an arithmetic series to calculate that quickly. (Of course, you can also type the numbers into Excel, and get the sum - but that doesn't scale well - e.g., it won't work well if you are then asked, for instance, to get the sum of the first million even numbers.)


Find 3 consecutive even numbers whose sum is 57?

The sum of two evens is even so the sum of any number of evens is even. It is, therefore, impossible for the sum of three even numbers, whether or not consecutive, to be 57, which is an odd number.


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of all the things i got is 2550


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The numbers are 32, 34, and 36.