The curve is  and the interval is .

Length of the curve   on the interval is  .

Find .

The function is .

Differentiate the function with respect to .

.

Substitute , and in .

Let , then .

Boundaries :

If , then .

If , then .

Substitute corresponding values in .

Consider .

Partial fraction decoposition.

Compare terms.

Compare constant terms.

Add equations (2) and (3).

Substitute in equation (2).

.

.

Substitute  in equation (1).

.

Length of the curve on is .