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mlddmlnog

CALCULUS.

  • one year ago
  • one year ago

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  1. mlddmlnog
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    |dw:1358986487783:dw|

    • one year ago
  2. lilfayfay
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    so you need to find the antiderivative correct?

    • one year ago
  3. mlddmlnog
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    yes :)

    • one year ago
  4. lilfayfay
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    hmm are u guys doing Integration rite now? haha xD

    • one year ago
  5. lilfayfay
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    cause im taking Calculus atm :)

    • one year ago
  6. mlddmlnog
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    oh, no our exam is tom.. so i'm doing the review sheet and I have no idea how to do this... :/

    • one year ago
  7. mlddmlnog
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    @UnkleRhaukus help? :'(

    • one year ago
  8. mlddmlnog
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    @zepdrix help??? :'(

    • one year ago
  9. lilfayfay
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    hm sorry it looked easy for a minute but idk what to do with the |x|

    • one year ago
  10. lilfayfay
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    sorry.. :\

    • one year ago
  11. zepdrix
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    Hmmmm I'm not familiar with seeing absolutes in integrals either. I think this is how we would deal with it though. Think about the function \(y=|x|\). It's a V-shape, formed by 2 lines, \(y=-x\) when \(x \lt0\) and \(y=x\) when \(x \gt0\). So I think we can replace the abs(x) with -x when our integral is dealing with values of x which are less than 0. And then also replace abs(x) with +x when we're dealing with positive values of x. Let's start by splitting up the integral.\[\large \int\limits_{-1}^3 \frac{|x|}{x}dx \qquad \rightarrow \qquad \int\limits_{-1}^0 \frac{|x|}{x}dx+\int\limits_{0}^3 \frac{|x|}{x}dx\]

    • one year ago
  12. zepdrix
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    Notice that we're dealing with NEGATIVE x's in the boundaries of the first integral, and POSITIVE x's in the boundaries of the second. \[\large \int\limits\limits_{-1}^0 \frac{-x}{x}dx+\int\limits\limits_{0}^3 \frac{x}{x}dx\]

    • one year ago
  13. zepdrix
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    I think that's what you're suppose to do.... I'm not positive though :3

    • one year ago
  14. mlddmlnog
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    ah thank you zepdrix. haha even though i just gave up on this one. it's too confusing for me.. i will post the next quesiton though. exam's tom :( and open study has been acting really really slowww. i couldnt get on for like an hour.

    • one year ago
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