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anonymous

  • one year ago

HELP BECOMING FAN AND MEDALS PLZ 1.) Find the derivative of f(x) = -3/x at x = -4 a) 3/4 b) 3/16 c) 16/3 d) 4/3 2.) Find the limit of the function by using direct substitution. lim x-->0 (x^2-2) a) 2 b) -2 c) doesnt exist d)0

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  1. anonymous
    • one year ago
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    @Miss.SweetiePie @ganeshie8

  2. anonymous
    • one year ago
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    @stratemeyerjr

  3. welshfella
    • one year ago
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    1. convert to negative power 3/x = 3x^-1 now to find the derivative use if y = ax^n derivative = anx^(n-1)

  4. Astrophysics
    • one year ago
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    To make it more clear, \[\frac{ d }{ dx } x^{n} = nx^{n-1}\] this is the power rule apply it, find the derivative using this then plug in x = -4.

  5. welshfella
    • one year ago
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    here a = 3 and n = -1

  6. Astrophysics
    • one year ago
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    And for 2, do as it says :)

  7. Astrophysics
    • one year ago
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    \[\lim_{x \rightarrow 0} ~~ x^2-2\] implying x is going to 0, so that should be an obvious substitution.

  8. anonymous
    • one year ago
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    for 1 i got 3/16 is that right?? @welshfella and number 2 i got B -2

  9. welshfella
    • one year ago
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    1. derivative = 2 / x^2 when x = -4 deriavative = 3 / 16 yes correct

  10. welshfella
    • one year ago
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    also b = (0)^2 - 2 = -2 yes

  11. welshfella
    • one year ago
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    good job

  12. anonymous
    • one year ago
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    thank u @welshfella

  13. welshfella
    • one year ago
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    yw

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