The functions are , and the interval is .
The extended mean value theorem to the functions and in the interval is .
Here .
Consider .
Substitute in .
.
Apply derivative on each side with respect to .
.
Consider .
Substitute .
.
Apply derivative on each side with respect to .
.
Substitute in .
.
.
Substitute in .
.
.
The extended mean value theorem to the functions and in the interval is .
Substitute corresponding values in .
Therefore, the value of .
The value of .
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