/2*x*sin(5*x)\ lim |------------| x->oo\ 5 /
Limit(((2*x)*sin(5*x))/5, x, oo, dir='-')
/2*x*sin(5*x)\ lim |------------| x->0+\ 5 /
0
= -5.34536365768728e-30
/2*x*sin(5*x)\ lim |------------| x->0-\ 5 /
0
= -5.34536365768728e-30
= -5.34536365768728e-30