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)

dilation scale factor 2: starting with δabc, draw the dilation image of the triangle with a center at the origin and a scale factor of two. notice that every coordinate of the original triangle has been multiplied by the scale factor (x2). dilation with scale factor 2, multiply by 2.