If y=u2y = u^2y=u2 and u=3x3+1u = 3x^3 + 1u=3x3+1, find dydx\frac{dy}{dx}dxdy using the chain rule.
2(3x3+1)(9x2)2(3x^3 + 1)(9x^2)2(3x3+1)(9x2)
2(9x2)2(9x^2)2(9x2)
2u2u2u
18x218x^218x2