ShootingStar16 320 Report post Posted March 19, 2016 So I am reviewing for my exam on antiderivatives and integrals and I am really stuck on this one particular question. The question is: Find the area between the indicated function and the x-axis. y=x^{3}+2x^{2}-3x from x=-4 to x=1. The answer should be (100/12) units^{2}, but I keep getting the wrong answer Any help is much appreciated! Share this post Link to post Share on other sites

kw0573 1,028 Report post Posted March 19, 2016 1 hour ago, ShootingStar16 said: So I am reviewing for my exam on antiderivatives and integrals and I am really stuck on this one particular question. The question is: Find the area between the indicated function and the x-axis. y=x^{3}+2x^{2}-3x from x=-4 to x=1. The answer should be (100/12) units^{2}, but I keep getting the wrong answer Any help is much appreciated! For signed area I got 25/12. For absolute value of area I got 245/12. I have no idea what the question is asking. 3 Share this post Link to post Share on other sites

Elite X-Naut 29 Report post Posted March 19, 2016 Net area: 25/12, absolute value of area: 245/12. I'm going to agree with kw0573 for the correct answer. 1 Share this post Link to post Share on other sites

ShootingStar16 320 Report post Posted March 20, 2016 Ok so maybe my teacher made a typo Thanks guys Share this post Link to post Share on other sites

ShootingStar16 320 Report post Posted March 20, 2016 oh wow I'm dumb Turns out the answer key does say 25/12 and it expressed it as a mixed number and I completely forgot about how to convert between mixed numbers and improper fractions... -cries in a corner- Share this post Link to post Share on other sites