Hi,

Stuck on curve sketching on the following.

y = x^5 -5x

You have part A which is finding the x-intercepts when y=0. I found x=0 and x= +and- 1.495.

IS THIS CORRECT??? please check

Then Part b is min/max when y'=0

y'=5x^4-5

5(x^4-1)=0

5=0 CANT USE........... then X= ROOT of 1 comes to x= - or + 1????

Then to solve for Y it s x= 1,-4 and x= -1,4 ???

Part C is pts of inflection y''=0

So it's y"=20x^3

How to solve for X???

Can some one direct me in the right direction, thanks

Joanne