The function is
and
.
Linear approximation of the function is
.
Consider
.
Differentiate on each side with respect to
.


Substitute
in above function.


.
.
\
Linear approximation at
is,
.
Substitute all these values in linear approximation equation.
\
The corresponding linear approximation is,
.
Approximate value for
.

Here,
.

Approximate value for
.
Approximate value for 

Approximate value for
.
\
Graph:
\Graph of the function and the tangent line.
\
\
Linear approximation of the function is
.
Approximate value for
.
Approximate value for
.
Graph of the function and the tangent is \ \
\
.