Derivative of an Inverse Tangent Function

Question

Question 19: Find the derivative of $$y = \arctan(3*x+2)$$.

Accepted Answer

$$\frac{3}{1+(3*x+2)^2}$$

Answer

$$\frac{1}{1+(3*x+2)^2}$$

Answer

$$\frac{3*(3*x+2)}{1+(3*x+2)^2}$$

Answer

$$\frac{3}{(3*x+2)^2}$$