using the Trapezoidal Rule with a partition of 100 points.

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1. We enter the function on the calculator:
   

2. Subdivide [1,3] into 100 subintervals of equal length.
3. The length of each of these subintervals is which is (3 - 1))/100 = 1/50.
4. We determine the endpoints of these subintervals:
   a_i = 1 + i (1/50) = 1 + i/50

5. We enter the left-hand endpoints on the calculator and store them in the variable x:
   

6. The calculator displays the list of left-hand endpoints:
   

7. The calculator automatically stores the values of f(a_i) in the list y1.
8. We now take the sum of the list y1, multiply by delta x, and store the answer in the variable L:
   

9. We enter the right-hand endpoints on the calculator and store them in the variable x:
   

10. The calculator displays the list of left-hand endpoints:
    

11. Again, the calculator automatically stores the values of f(a_i) in the list y1.
12. We now take the sum of the list y1, multiply by delta x, and store the answer in the variable R:
    

13. Finally, we take the average of the sums:
    
    to get the answer 1.5302437923.