The function is
.
Let 

Differentiate on each side with respect to
.

.
The interval is
.
Newtons approximation method formula :
.
Perform newton approximation for
.
Newton formula :
.


Similarly perform newton approximation for
.
Newton formula :
.


Similarly perform newton approximation for
.
Newton formula :
.


Similarly perform newton approximation for
.
Newton formula :
.


The fixed point is approximartely
.