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What is the sum of the squares of the first 20 natural numbers 1 to 20?
The sum of the first N square numbers is: N*(N+1)*(2N+1)/6 So putting N = 20 gives 2870.
What is the sum between -5 and 20?
The sum of -5 and 20 is 15. The distance between -5 and 20 is 25. The sum of the numbers between -5 and 20 is 180. The sum of the numbers from -5 to 20 is 195.
The average of two numbers is 10 What is the sum of the two numbers?
Avreage = Sum/number of values So 10 = sum/2 Multiply both sides by 2: 20 = sum
What is the sum of 20?
The sum is the result you get when you add two or more numbers together. A single number can be the sum of two or more other numbers when they are added together but cannot be expressed as you ask in your question. Though you could ask "What numbers have the sum of 20?" For instance 20 is the sum of (10 + 10), (5 + 15), (2 + 7 + 11) etc., but is not in itself a sum.
The sum of two numbers is 10 and their product is 20 find the sum of the reciprocal of the number.?
1/x + 1/y y/xy + x/xy (y+x)/xy= 10/20 10/20=1/2 1/2 is the answer.
