I just need a quick small explanation for this please :)
http://apcentral.collegeboard.com/apc/public/repository/_ap05_sg_calculus_ab__46570.pdf
Question 4, part C
http://prntscr.com/5v1ctv

Question

sleepyhead314 · Answer

I reasoned: "when the area under the function cancels out to 0"
and so I got -1 and 1
but how did they get 3?

anonymous · Answer

pg

sleepyhead314 · Answer

$$\int\limits_{x}^{3}f(x)dt=0$$

anonymous · Answer

I am Groot.

anonymous · Answer

Okay I'm kidding. SOrry what is your question?

sleepyhead314 · Answer

I want to know how they got "3" as an answer for question 4, part C

anonymous · Answer

Oh that looks pretty hard. Um lemme check it over okay?

sleepyhead314 · Answer

@jdoe0001 @whpalmer4 just a little help please?

anonymous · Answer

@Rosabearof10  could you help?

sleepyhead314 · Answer

*scratches head*
might it be because 0 width makes the area 0? ;-;

anonymous · Answer

Let me see.