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clara1223

  • one year ago

find the limit as x approaches infinity of ((4x^3)-x-5)/(4x-7)

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  1. clara1223
    • one year ago
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    \[\lim_{x \rightarrow \infty}\frac{ 4x ^{3}-x-5 }{ 4x-7 }\]

  2. amistre64
    • one year ago
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    and your working now?

  3. clara1223
    • one year ago
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    same as the last question? would I divide everything by the highest power of x?

  4. amistre64
    • one year ago
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    yep, divide by highest power if x

  5. amistre64
    • one year ago
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    *of x

  6. clara1223
    • one year ago
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    I get 4/0 and you cannot have a 0 in the denominator so as @EllaElla02 said, the limit does not exist.

  7. amistre64
    • one year ago
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    depends on how your book defines infinity ... it is either DNE or +inf

  8. clara1223
    • one year ago
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    in class we use DNE

  9. amistre64
    • one year ago
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    in other courses, the would say +inf :)

  10. clara1223
    • one year ago
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    because it covers - inf and +inf so its safer

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