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anonymous

  • 5 years ago

--->>>Problem #8

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  1. anonymous
    • 5 years ago
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  2. anonymous
    • 5 years ago
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    Why is the answer not 14?

  3. anonymous
    • 5 years ago
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    i did 142-2/10-0 = 140/10 = 14

  4. EarthCitizen
    • 5 years ago
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    \[f(t)=t ^{2}+4t+2 \therefore f(t)\prime=2t+4\]

  5. anonymous
    • 5 years ago
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    ???

  6. EarthCitizen
    • 5 years ago
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    you differentiate f(t)

  7. anonymous
    • 5 years ago
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    o wait

  8. anonymous
    • 5 years ago
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    i plugged in 10 but i wasnt supposed to, right?

  9. EarthCitizen
    • 5 years ago
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    yep

  10. anonymous
    • 5 years ago
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    just 0 and t

  11. EarthCitizen
    • 5 years ago
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    no, find the zeroes of the first function f(t) leaving you with \[t=-2-\sqrt(2) , \sqrt(2)-2\]

  12. anonymous
    • 5 years ago
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    im kinda confused

  13. anonymous
    • 5 years ago
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    can you show work please

  14. EarthCitizen
    • 5 years ago
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    \[2t+4=10 \therefore t=3\] i think

  15. anonymous
    • 5 years ago
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    im getting even more confused... i dont think we've covered what you are doing in my class yet

  16. EarthCitizen
    • 5 years ago
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    have you done differentiation ?

  17. anonymous
    • 5 years ago
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    dont think so? if we have, i must've been day dreaming or something

  18. EarthCitizen
    • 5 years ago
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    ouch! not a good thing to solve calculus if you haven't done it before you'll just be hurting your mind

  19. anonymous
    • 5 years ago
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    the answers not 3 btw

  20. EarthCitizen
    • 5 years ago
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    yh, what was it ?

  21. anonymous
    • 5 years ago
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    idk yet, you tell me lol

  22. EarthCitizen
    • 5 years ago
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    what are the options then ?

  23. anonymous
    • 5 years ago
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    no options

  24. anonymous
    • 5 years ago
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    it just tells you if you got it right or wrong

  25. EarthCitizen
    • 5 years ago
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    shoot!

  26. anonymous
    • 5 years ago
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    at least i get unlimited tries lol

  27. EarthCitizen
    • 5 years ago
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    since y=mx+c then f(t)'=2t+4

  28. anonymous
    • 5 years ago
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    its 6

  29. anonymous
    • 5 years ago
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    the answer is 6

  30. anonymous
    • 5 years ago
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    i do just plug in 0 and t and then do rate of change

  31. EarthCitizen
    • 5 years ago
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    alryt, show me wh@ you did ?

  32. EarthCitizen
    • 5 years ago
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    we are all learning

  33. anonymous
    • 5 years ago
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    f(0)^2+4(0)+2=2 f(t)=t^2+4t+2 t^2+4t+2-(2)/t =t+4 t=6 because 6+4 is 10 (10 is given in the problem)

  34. EarthCitizen
    • 5 years ago
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    alryt, i see. why did you divide thru by t ?

  35. anonymous
    • 5 years ago
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    its usually by h but since there is no h i made it a t (im using the difference quotient formula or whatever its called)

  36. EarthCitizen
    • 5 years ago
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    alryt, so you haven't done calculus before ?

  37. anonymous
    • 5 years ago
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    first time

  38. EarthCitizen
    • 5 years ago
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    awesome!

  39. anonymous
    • 5 years ago
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    why is that? lol

  40. EarthCitizen
    • 5 years ago
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    yh, coz you haven't done calculus yet and you did a calculus problem, so th@s awesome

  41. anonymous
    • 5 years ago
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    lol

  42. anonymous
    • 5 years ago
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    i posted another question that you could maybe help me with

  43. EarthCitizen
    • 5 years ago
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    alryt, i'll try wish me luck

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