Since the CTE tells us that we have a quantity raised to the 5, we should use the chain rule in the following form.

d dx

u5 = 5u4

du dx

d dx		3x 1 x2 x1		5	=	5 3x 1 x2 x1 4 d dx 3x 1 x2 x1
					=	5 3x 1 x2 x1 4 3(x2x1)(3x1)(2x+x2) (x2x1)2	(by the quotient rule)

Just close this window to return to the tutorial.