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Which statement best describes the limit shown below?

lim_(x rarr oo)(-6log_(5)x+x^(89))/(x^(18)+5^(x))
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?\newlinelimx6log5x+x89x18+5x \lim _{x \rightarrow \infty} \frac{-6 \log _{5} x+x^{89}}{x^{18}+5^{x}} \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?\newlinelimx6log5x+x89x18+5x \lim _{x \rightarrow \infty} \frac{-6 \log _{5} x+x^{89}}{x^{18}+5^{x}} \newlineThe limit equals zero\newlineThe limit does not exist\newlineThe limit exists and does not equal zero
  1. Analyze Behavior as xx Approaches Infinity: We need to analyze the behavior of the numerator and the denominator as xx approaches infinity.\newlineThe numerator is 6log5x+x89-6\log_{5}x + x^{89}, and the denominator is x18+5xx^{18} + 5^{x}.\newlineAs xx approaches infinity, x89x^{89} will grow much faster than 6log5x-6\log_{5}x, so the dominant term in the numerator is x89x^{89}.\newlineSimilarly, in the denominator, 5x5^{x} will grow much faster than x18x^{18}, so the dominant term in the denominator is 5x5^{x}.
  2. Compare Growth Rates of Dominant Terms: To determine the limit, we compare the growth rates of the dominant terms in the numerator and the denominator.\newlineThe term x89x^{89} is a polynomial term, and it grows faster than any logarithmic function but slower than an exponential function like 5x5^{x}.\newlineTherefore, as xx approaches infinity, the denominator's growth rate will outpace the numerator's growth rate.
  3. Determine Limit Approach: Since the denominator grows faster than the numerator, the fraction as a whole will approach 00 as xx approaches infinity. This means that the limit of the function as xx approaches infinity is 00.

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