$\"\"$

The function is $\"\"$

The function $\"\"$ approaches to undefined at $\"\"$ ,to estimate the limit we

take all nearest values in both forward and backward direction to $\"\"$

$\"\"$

\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \

x	3.9	3.99	3.999	4.001	4.01	4.1
f(x)	0.2041	0.2004	0.2000	0.2000	0.1996	0.1961