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Which statement best describes the limit shown below?

lim_(x rarr oo)(x^(71)+log_(3)x)/(3x^(71)+x^(29))
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?\newlinelimxx71+log3x3x71+x29 \lim _{x \rightarrow \infty} \frac{x^{71}+\log _{3} x}{3 x^{71}+x^{29}} \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?\newlinelimxx71+log3x3x71+x29 \lim _{x \rightarrow \infty} \frac{x^{71}+\log _{3} x}{3 x^{71}+x^{29}} \newlineThe limit equals zero\newlineThe limit does not exist\newlineThe limit exists and does not equal zero
  1. Given Limit Analysis: We are given the limit: \newlinelimxx71+log3x3x71+x29\lim_{x \to \infty}\frac{x^{71}+\log_{3}x}{3x^{71}+x^{29}}\newlineTo find the limit as xx approaches infinity, we need to analyze the behavior of the numerator and the denominator separately.
  2. Highest Power Comparison: First, let's consider the highest power of xx in both the numerator and the denominator, which will dominate the behavior of the function as xx approaches infinity.\newlineIn the numerator, the highest power of xx is x71x^{71}.\newlineIn the denominator, the highest power of xx is 3x713x^{71}.
  3. Simplification by Division: We can divide both the numerator and the denominator by x71x^{71} to simplify the expression.\newlineThis gives us:\newlinelimx(x71x71+log3xx71)/(3x71x71+x29x71)\lim_{x \to \infty}\left(\frac{x^{71}}{x^{71}}+\frac{\log_{3}x}{x^{71}}\right)/\left(\frac{3x^{71}}{x^{71}}+\frac{x^{29}}{x^{71}}\right)
  4. Limit of Individual Terms: Simplifying the powers of x, we get: limx(1+(log3x)/x713+(x29/x71))\lim_{x \to \infty}\left(\frac{1+\left(\log_{3}x\right)/x^{71}}{3+\left(x^{29}/x^{71}\right)}\right)
  5. Final Simplification: As xx approaches infinity, log3xx71\frac{\log_{3}x}{x^{71}} approaches 00 because the logarithmic function grows much slower than the power function x71x^{71}.\newlineSimilarly, x29x71\frac{x^{29}}{x^{71}} also approaches 00 because the exponent in the numerator is much smaller than the exponent in the denominator.
  6. Final Simplification: As xx approaches infinity, log3xx71\frac{\log_{3}x}{x^{71}} approaches 00 because the logarithmic function grows much slower than the power function x71x^{71}.\newlineSimilarly, x29x71\frac{x^{29}}{x^{71}} also approaches 00 because the exponent in the numerator is much smaller than the exponent in the denominator.After taking the limits of the individual terms, we get:\newlinelimx1+03+0\lim_{x \to \infty}\frac{1+0}{3+0}
  7. Final Simplification: As xx approaches infinity, log3xx71\frac{\log_{3}x}{x^{71}} approaches 00 because the logarithmic function grows much slower than the power function x71x^{71}.\newlineSimilarly, x29x71\frac{x^{29}}{x^{71}} also approaches 00 because the exponent in the numerator is much smaller than the exponent in the denominator.After taking the limits of the individual terms, we get:\newlinelimx1+03+0\lim_{x \to \infty}\frac{1+0}{3+0}Simplifying the expression, we find that the limit is:\newlinelimx13\lim_{x \to \infty}\frac{1}{3}
  8. Final Simplification: As xx approaches infinity, log3xx71\frac{\log_{3}x}{x^{71}} approaches 00 because the logarithmic function grows much slower than the power function x71x^{71}. Similarly, x29x71\frac{x^{29}}{x^{71}} also approaches 00 because the exponent in the numerator is much smaller than the exponent in the denominator.After taking the limits of the individual terms, we get: limx1+03+0\lim_{x \to \infty}\frac{1+0}{3+0} Simplifying the expression, we find that the limit is: limx13\lim_{x \to \infty}\frac{1}{3} The limit of a constant is the constant itself, so the limit is: 13\frac{1}{3}

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