Which statement best describes the limit shown below?x→∞limx18+5x−6log5x+x89The limit equals zeroThe limit does not existThe limit exists and does not equal zero
Q. Which statement best describes the limit shown below?x→∞limx18+5x−6log5x+x89The limit equals zeroThe limit does not existThe limit exists and does not equal zero
Analyze Behavior as x Approaches Infinity: We need to analyze the behavior of the numerator and the denominator as x approaches infinity.The numerator is −6log5x+x89, and the denominator is x18+5x.As x approaches infinity, x89 will grow much faster than −6log5x, so the dominant term in the numerator is x89.Similarly, in the denominator, 5x will grow much faster than x18, so the dominant term in the denominator is 5x.
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.The term x89 is a polynomial term, and it grows faster than any logarithmic function but slower than an exponential function like 5x.Therefore, as x approaches infinity, the denominator's growth rate will outpace the numerator's growth rate.
Determine Limit Approach: Since the denominator grows faster than the numerator, the fraction as a whole will approach 0 as x approaches infinity. This means that the limit of the function as x approaches infinity is 0.