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Which statement best describes the limit shown below?

lim_(x rarr oo)(4e^(x))/(-x^(34))
The limit equals zero
The limit does not exist
The limit exists and does not equal zero

Which statement best describes the limit shown below?\newlinelimx4exx34 \lim _{x \rightarrow \infty} \frac{4 e^{x}}{-x^{34}} \newlineThe limit equals zero\newlineThe limit does not exist\newlineThe limit exists and does not equal zero

Full solution

Q. Which statement best describes the limit shown below?\newlinelimx4exx34 \lim _{x \rightarrow \infty} \frac{4 e^{x}}{-x^{34}} \newlineThe limit equals zero\newlineThe limit does not exist\newlineThe limit exists and does not equal zero
  1. Analyze Function: Analyze the given function.\newlineWe are given the function (4ex)/(x34)(4e^{x})/(-x^{34}) and we need to find the limit as xx approaches infinity. We notice that the numerator grows exponentially with xx, while the denominator grows polynomially with a very high degree (3434).
  2. Compare Growth Rates: Compare the rates of growth of the numerator and the denominator.\newlineThe exponential function exe^{x} grows faster than any polynomial function as xx approaches infinity. However, the degree of the polynomial in the denominator is significantly higher than the exponent in the numerator, which suggests that the denominator will eventually outgrow the numerator as xx becomes very large.
  3. Apply Limits: Apply the concept of limits to the function.\newlineAs xx approaches infinity, the exponential term exe^{x} becomes very large, but the polynomial term x34x^{34} becomes much larger. Since the denominator grows faster than the numerator, the fraction as a whole approaches zero.
  4. Conclude Limit: Conclude the limit.\newlineThe limit of 4exx34\frac{4e^{x}}{-x^{34}} as xx approaches infinity is zero because the denominator's growth rate is much higher than that of the numerator.

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