Originally Posted by

**hadidehghanzade** please let me know how to solve the problem.

Take for example, the equation:

If I try to numerically integrate that I get:

Code:

In[105]:=
Clear[x, y]
NDSolve[{Derivative[1][y][x] ==
(3*x^2)/(3*y[x]^2 - 4), y[1] == 0},
y, {x, 1, 2}]
During evaluation of In[105]:=
NDSolve::ndsz:At x == 1.597809453897525`,
step size is effectively zero;
singularity or stiff system suspected. >>
Out[106]=
{{y -> InterpolatingFunction[]}}

The (full) solution is below. Why is the integrator giving me that message?