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How do I find the sum of 1 to 20?
The sum from 1 to n is n*(n+1)/2In this case that mean 20*21/2 = 210The sum from 1 to n is n*(n+1)/2In this case that mean 20*21/2 = 210The sum from 1 to n is n*(n+1)/2In this case that mean 20*21/2 = 210The sum from 1 to n is n*(n+1)/2In this case that mean 20*21/2 = 210
What is the answer to negative six n plus five equals one?
If you mean: -6n+5 = 1 then the value of n is 2/3
What is this answer to Negative 17 equals 15 n minus 20?
If you mean -17 = 15n -20 then the value of n is 1/5
What number does n represent in maths?
n is a variable. It could mean any number you want it to. Most of the time, it is not specified what it is. Sometimes they give you clues about it, like "5 times n is 5." In this case n is 1.
The mean of n numbers is 5 If the number 13 is now included with the n numbers the new mean is 6 Find the value of n?
The mean of N numbers is the sum of those numbers divided by N. If you include 13 in that set and the new mean is 6, then the original N is 7. Let X be the original sum. You have a system of two simultaneous equations. 1.) X/N = 5 2.) X+13/N+1 = 6 To solve, substitute the value of X from eq. 1 into eq. 2 and then solve eq. 2 for N. (Some steps combined) X = 5N5N+13 = 6(N+1)5N = 6N-7-N = -7N = 7
