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