hi sorry about the messy question... i have added it as an attatchement. i managed to do the first part but cannot seem to do the the last part of part b.
im so lost with this question, i have tried a lot and cannot solve it :
A particle of unit mass moves on a straight line under a force having potential energy V (x) =
x3=(x^4 + a^4) where and a are positive constants. Sketch the graph of V (x).
(a) Find the period of small oscillations...