I have a question: find $\frac{dy}{dx}$ for $y = (2x^4 + 1)^6$.
The final answer I get for this is $48x^3(2x^4+1)^5$.
However, the solutions say that the answer should be $48x^3(2x^4+1)^6$.
Where did the power of 6 come from ? is this a mistake in the solutions or have I done something incorrect ?