- #1
ArnfinnS
- 11
- 0
hi i have a small problem.
i need to prove that these two expressions are equal :
(n*Sum{i=1,n}Xi*Yi - Sum{i=1,n}Xi*Sum{i=1,n}Yi)/(n*Sum{i=1,n}(Xi)^2 - (Sum{i=1,n}Xi)^2)
and the expression :
(Sum{i=1,n}(Xi)*(Xi*Y^ - Yi*X^))/(Sum{i=1,n}((Xi)^2 - (x^)^2 ))
here is x^ and y^ the middle values of x and y .
i need to transpose the one expression over in the other. But i can't get this to work.
Can someone help me?
i need to prove that these two expressions are equal :
(n*Sum{i=1,n}Xi*Yi - Sum{i=1,n}Xi*Sum{i=1,n}Yi)/(n*Sum{i=1,n}(Xi)^2 - (Sum{i=1,n}Xi)^2)
and the expression :
(Sum{i=1,n}(Xi)*(Xi*Y^ - Yi*X^))/(Sum{i=1,n}((Xi)^2 - (x^)^2 ))
here is x^ and y^ the middle values of x and y .
i need to transpose the one expression over in the other. But i can't get this to work.
Can someone help me?