Find the first partial derivatives of the function. (sn = x1 + 2x2 + + nxn; i = 1, n. give your answer only in terms of sn and i.) u = sin(x1 + 2x2 + ⋯ + nxn)

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4