clara1223
  • clara1223
find the limit as x approaches infinity of ((4x^3)-x-5)/(4x-7)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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clara1223
  • clara1223
\[\lim_{x \rightarrow \infty}\frac{ 4x ^{3}-x-5 }{ 4x-7 }\]
amistre64
  • amistre64
and your working now?
clara1223
  • clara1223
same as the last question? would I divide everything by the highest power of x?

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amistre64
  • amistre64
yep, divide by highest power if x
amistre64
  • amistre64
*of x
clara1223
  • clara1223
I get 4/0 and you cannot have a 0 in the denominator so as @EllaElla02 said, the limit does not exist.
amistre64
  • amistre64
depends on how your book defines infinity ... it is either DNE or +inf
clara1223
  • clara1223
in class we use DNE
amistre64
  • amistre64
in other courses, the would say +inf :)
clara1223
  • clara1223
because it covers - inf and +inf so its safer

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