/-cos(3*x) + cos(x)\ lim |------------------| x->oo| 2 | \ x /
Limit((-cos(3*x) + cos(x))/x^2, x, oo, dir='-')
/-cos(3*x) + cos(x)\ lim |------------------| x->0+| 2 | \ x /
4
= 4.0
/-cos(3*x) + cos(x)\ lim |------------------| x->0-| 2 | \ x /
4
= 4.0
= 4.0