Eric Nicholas K's answer to Abby's United States question.
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Here. Let me know if you do not understand the workings or the picture is too blurry.
Date Posted:
4 years ago
You can use a computer to sketch the cubic graph out. You will see that from 0 to 8, there is a section in which the graph is below the horizontal axis.
Remember that areas below the horizontal axis will have a negative integral value (this is a property of areas which lie below the x-axis) and this negative value will cancel out the positive values above the x-axis and not add to the overall value.
This is the reason why we have to check for any possible such situations.
Remember that areas below the horizontal axis will have a negative integral value (this is a property of areas which lie below the x-axis) and this negative value will cancel out the positive values above the x-axis and not add to the overall value.
This is the reason why we have to check for any possible such situations.
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