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OmidV

  • 4 years ago

I will draw diagram, question asks for the rise and slope of the secant line.

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  1. OmidV
    • 4 years ago
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    |dw:1330580434660:dw| curve is y = 4x^2 + 5x

  2. sasogeek
    • 4 years ago
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    huh? what do u mean by "chicken" ?

  3. OmidV
    • 4 years ago
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    I think he's just goofing around :D Can't blame him, it's 3am here I just want to solve this and then go to bed :P

  4. sasogeek
    • 4 years ago
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    and then u delete that answer and we all look stupid...

  5. lebojoe
    • 4 years ago
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    Lol sorry. saso. sorry man ahah im a little tired today so cant blame me for being goofy. excuse my immatureness

  6. sasogeek
    • 4 years ago
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    well if you couldn't answer it now, no need to have even made a comment in the first place...

  7. lebojoe
    • 4 years ago
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    Umm If i remeber correctly..Ohh na cant.. umm try googling bro.

  8. OmidV
    • 4 years ago
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    Your immaturity* has been excused. Now if you don't mind, discuss your boredom in chat as I would like to solve this.

  9. lebojoe
    • 4 years ago
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    Have you googled. Google helps me in these situations

  10. sasogeek
    • 4 years ago
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    this is in a calculus class... right? i know the gradient function to be the first derivative of a curve function... not sure how to find the "rise" though... i suppose that means the height?

  11. EarthCitizen
    • 4 years ago
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    i presume this is pre-calculus ?

  12. OmidV
    • 4 years ago
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    Yes, the height is the rise. Well, this is my first calculus course in college for computer engineering - computing science. It assumes no previous knowledge of calculus. If that's what pre-calc means then yes.

  13. OmidV
    • 4 years ago
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    I remember it had something to do with the y at 2 being f(2), and then the y at 2+h being f(2+h)

  14. OmidV
    • 4 years ago
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    It's possible my answer was incorrect because I added instead of subtracted, one moment please.

  15. EarthCitizen
    • 4 years ago
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    do you know how to differentiate ?

  16. OmidV
    • 4 years ago
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    I recognize the term so probably, I just can't really think of an example atm. It's very late. Here, this is what I think I'm supposed to do to find the rise: y2 - y1, y2 = f(2+h), y1 = f(2). f(2+h) = 4(2+h)^2 + 5(2+h), f(2) = 4(2)^2 + 5(2)

  17. OmidV
    • 4 years ago
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    Yeah that's definitely it, I'm not sure how I managed to mess that up during the test.

  18. EarthCitizen
    • 4 years ago
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    to find the slope is simply the rise/run

  19. OmidV
    • 4 years ago
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    Nice, solved my own question :D does that mean I get a medal for good answer? ;)

  20. OmidV
    • 4 years ago
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    Yeah the slope was the "easy" part just divide by h basically.

  21. sasogeek
    • 4 years ago
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    f(2+h) is the function of the rise... you'll notice that f(2+h) is the y value as the x value = 2+h|dw:1330589766893:dw|

  22. OmidV
    • 4 years ago
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    Thanks saso, I got the answer now :D

  23. sasogeek
    • 4 years ago
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    |dw:1330589944341:dw|

  24. sasogeek
    • 4 years ago
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    ok some part of it got missing... \[\huge \frac{f(2+h)-f(2)}{h} \]

  25. OmidV
    • 4 years ago
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    Thank you saso :)

  26. sasogeek
    • 4 years ago
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    yw :) i hope it's clear though

  27. OmidV
    • 4 years ago
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    Yup, I figured it out after retrying the question, I guess before I went through the right steps but I had 4h^2 + 13h as opposed to the correct 4h^2 + 21h (for the rise), so it was a calculation error and I assumed I was doing the problem wrong so came here for help :D

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