Find the 1st and second derivative of y=x^3/3+x^2/2+x/4

Question

My answer is x^2/9+x/4however back of the book says x^2+x

Answer 1

First derivative is x^2 + x + 4

 

second Is 2x + 1

 

remember the "power down" rule

tale the exponent down by one and also take it down out front