Question 3 $3.1$ Given that: $$ **{3} y^{2}+\cosh \left(3 y=x^{2} ight)=2 y^{3} $$ Use implicit differentiation to find $\frac{d yHd x]$. Show all your steps. $3.25 Use logarithmic differentiation to find $\frac{d yHd x]$ for $$ y=\frac{\left(x^{3}-x ight)^{5}}\tan (4 x)} $$ $3.35 Find the directional derivative $D_{a} F(2,3)$ in the direction of $(1,2)5 for f(x, y)=2 x y^{2} . SP.SD.322 $$ $$