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Tutorial: Trapezoidal Rule

Finally, we just need to sum:

Step 4: Sum your results

All we need to do is use a SUM command in our column D and multiply by h/2. We used = h/2*SUM(D2:D7) to perform this command in cell D8.

 
A
B
C
D
1
x
f(x)
Constants
 
2
2.0
4
1
4
3
3.2
10.24
2
20.48
4
4.4
19.36
2
38.72
5
5.6
31.36
2
62.72
6
6.8
46.24
2
92.48
7
8.0
64
1
64
8
169.44

We are now finished.

 

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