Question

# Find derivatives for the functions. Assume a, b, c, and k are constants. y=x^{2}\sqrt{x^{2}+1}

Derivatives
Find derivatives for the functions. Assume a, b, c, and k are constants.
$$\displaystyle{y}={x}^{{{2}}}\sqrt{{{x}^{{{2}}}+{1}}}$$

This answer is incorrect. The denominator of the second step should be multiplied by $$2 [1/(2*\sqrt{x^2+1})]$$.
This would cancel out the 2 in the numerator of the second part of the answer, leaving on $$x^3$$ in the numerator.