What is the difference between area under a curve and area between two curves?
Area under one curve integrates f(x); area between two curves integrates the difference (upper − lower) of the two functions.
Area under one curve integrates f(x); area between two curves integrates the difference (upper − lower) of the two functions. A reliable way to keep them apart is to focus on what each one is defined by, not just the similar-sounding words.
Key point
area under a curve vs area between two curves
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