Determine the following limit in simplest form. If the limit is infinite, state that the limit does not exist (DNE).x→∞lim9+7x3+2x2−24x2+49x6Answer:
Q. Determine the following limit in simplest form. If the limit is infinite, state that the limit does not exist (DNE).x→∞lim9+7x3+2x2−24x2+49x6Answer:
Factor out highest power: We are asked to find the limit of the function as x approaches infinity. To simplify the expression, we can factor out the highest power of x in the numerator and denominator.
Factor out x3: In the numerator, the highest power of x is x6, so we factor out x3 from the square root to get x3 times the square root of the remaining expression.−24x2+49x6 = x3−x424+49
Rewrite with factored terms: In the denominator, the highest power of x is x3, so we factor out x3 from each term.(9+7x3+2x2)=x3×(x39+7+x2)
Cancel out x3 terms: Now we rewrite the original limit expression with the factored terms.\lim_{x \to \infty}\left(\frac{\sqrt{\(-24\)x^{\(2\)}+\(49\)x^{\(6\)}}}{\(9\)+\(7\)x^{\(3\)}+\(2\)x^{\(2\)}}\right) = \lim_{x \to \infty}\left(\frac{x^\(3\) \sqrt{\(-24\)/x^{\(4\)} + \(49\)}}{x^\(3\) \left(\(9\)/x^\(3\) + \(7\) + \(2\)/x\right)}\right)
Simplify as \(x\) approaches infinity: We can now cancel out the \(x^3\) terms in the numerator and denominator.\(\newline\)\(\lim_{x \to \infty}\left(\frac{x^\(3\) \sqrt{-\frac{\(24\)}{x^{\(4\)}} + \(49\)}}{x^\(3\) \left(\frac{\(9\)}{x^\(3\)} + \(7\) + \frac{\(2\)}{x}\right)}\right) = \lim_{x \to \infty}\left(\frac{\sqrt{-\frac{\(24\)}{x^{\(4\)}} + \(49\)}}{\frac{\(9\)}{x^\(3\)} + \(7\) + \frac{\(2\)}{x}}\right)
Simplify square root and denominator: As \(x\) approaches infinity, the terms with \(x\) in the denominator approach zero. Therefore, we can simplify the expression by removing those terms.\(\newline\)\[\lim_{x \to \infty}\left(\frac{\sqrt{-\frac{24}{x^{4}} + 49}}{\frac{9}{x^3} + 7 + \frac{2}{x}}\right) = \lim_{x \to \infty}\left(\frac{\sqrt{0 + 49}}{0 + 7 + 0}\right)
Final answer: Now we can simplify the square root and the denominator.limx→∞(749)=77
Final answer: Now we can simplify the square root and the denominator.limx→∞(49)/7=7/7Finally, we simplify the fraction to get the final answer.7/7=1