The function is 
To estimate value of limit , construct a table with nearest values of 
![]() | \
\
| \
\
| \
![]() | \
![]() | \
![]() | \
![]() | \
![]() | \
![]() | \
![]() | \
![]() | \
![]() | \
![]() | \
![]() | \
Observe the table:
\The value of
at
is
and the value of
at
is
.
The value of
.
Graph the function:
.

Observe the graph:
\As
approaches to
,
gets closer to
.
.