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anonymous

  • 5 years ago

lim x→−3 6x + 18/|x + 3|

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  1. anonymous
    • 5 years ago
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    i got 6 but i think its wrong

  2. amistre64
    • 5 years ago
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    the top factors to cancel the bootom

  3. amistre64
    • 5 years ago
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    6 is right

  4. anonymous
    • 5 years ago
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    but what about the absolute value signs

  5. amistre64
    • 5 years ago
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    6(x+3) ------ hmm, i think they are the same as a + value here |x+3|

  6. anonymous
    • 5 years ago
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    i thought i had to do -x-3, and x+3

  7. amistre64
    • 5 years ago
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    http://www.wolframalpha.com/input/?i=lim {x+to+-3}%28%286x%2B18%29%2F%28|x%2B3|%29%29

  8. amistre64
    • 5 years ago
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    http://www.wolframalpha.com/input/?i=lim {x+to+-3}%28%286x%2B18%29%2F%28|x%2B3|%29%29

  9. amistre64
    • 5 years ago
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    it cuts the link short...

  10. amistre64
    • 5 years ago
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    i see it tho... the limit doesnt exist it says

  11. amistre64
    • 5 years ago
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    since the limit is not the same form left and right; no limit exists

  12. anonymous
    • 5 years ago
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    okay thanks

  13. amistre64
    • 5 years ago
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    those absolutes getcha i fyou dont watch for em

  14. anonymous
    • 5 years ago
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    yeah im doing like 40 problems of nothing put absolutes

  15. amistre64
    • 5 years ago
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    lol.. good for the practice :)

  16. anonymous
    • 5 years ago
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    haha yeah i guess

  17. amistre64
    • 5 years ago
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    if you factor it to get the same looking stuff; it tends to wanna break apart at the '0' limit if thats what they are going for

  18. anonymous
    • 5 years ago
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    lim x->-7 (7 - (abs of (x))/(7 + x) is this DNE

  19. amistre64
    • 5 years ago
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    7 - |x| ------ right? 7+x

  20. anonymous
    • 5 years ago
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    yeah

  21. amistre64
    • 5 years ago
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    lets see what this does a little bit to the left and right of -7 then

  22. amistre64
    • 5 years ago
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    -6.9; what doe we get?

  23. anonymous
    • 5 years ago
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    1

  24. amistre64
    • 5 years ago
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    ok.. and at 7.1?

  25. amistre64
    • 5 years ago
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    -7.1 that is

  26. anonymous
    • 5 years ago
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    1

  27. anonymous
    • 5 years ago
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    so its 1

  28. amistre64
    • 5 years ago
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    thats a good sign; try with smaller numbers to be sure; -6.9999 and -7.0001

  29. amistre64
    • 5 years ago
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    the answer is 1 :)

  30. anonymous
    • 5 years ago
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    okay that seems much easier than doing it the way my professor said

  31. amistre64
    • 5 years ago
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    if the limit on the left and right are the same; then you have the limit; if they differ, no limit ewxists

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