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haterofmath

  • 2 years ago

limit of (x-1)^2(x+1) as x approaches 3

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  1. zzr0ck3r
    • 2 years ago
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    is there any reason you just cant plug in 3?

  2. alexwee123
    • 2 years ago
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    ^^ ya substitute 3 for x

  3. haterofmath
    • 2 years ago
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    i dont think. there's any steps i would have to show?

  4. LeeYeongKyu
    • 2 years ago
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    |dw:1347497171437:dw|

  5. LeeYeongKyu
    • 2 years ago
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    do you mean this?

  6. zzr0ck3r
    • 2 years ago
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    note: unless ding so makes you devide by zero, take a sqrt( a negative number ), or take a ln( negative number ), then you can plug in for x

  7. zzr0ck3r
    • 2 years ago
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    you can show what ever step you would in algebra.

  8. zzr0ck3r
    • 2 years ago
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    (3-1)^2 * (3+1) = 2^2 * 4 .....

  9. haterofmath
    • 2 years ago
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    \[\lim_{x \rightarrow 2}(x-1)^2(x+1)\]

  10. haterofmath
    • 2 years ago
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    sorry not 2 but 3

  11. zzr0ck3r
    • 2 years ago
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    3 or 2? Not that it makes a dif here, just plug in for x

  12. zzr0ck3r
    • 2 years ago
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    ahh ...

  13. zzr0ck3r
    • 2 years ago
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    now if it where lim x->3 of 1/(3-x) then you could not just plug in for x because you would get 1/0

  14. zzr0ck3r
    • 2 years ago
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    were

  15. haterofmath
    • 2 years ago
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    find the indicated one-sided limit. if the limiting value is inifinte indicate whther is is \[+\infty or -\], \[\lim_{x \rightarrow 4} (3x-9)\]

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