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Find the limit as 
x approaches negative infinity.

lim_(x rarr-oo)(9x^(6))/(sqrt(9x^(12)+4x^(6)))=

Find the limit as x x approaches negative infinity.\newlinelimx9x69x12+4x6= \lim _{x \rightarrow-\infty} \frac{9 x^{6}}{\sqrt{9 x^{12}+4 x^{6}}}=

Full solution

Q. Find the limit as x x approaches negative infinity.\newlinelimx9x69x12+4x6= \lim _{x \rightarrow-\infty} \frac{9 x^{6}}{\sqrt{9 x^{12}+4 x^{6}}}=
  1. Identify highest power of x: Identify the highest power of x in the numerator and denominator.\newlineIn the expression (9x6)/(9x12+4x6)(9x^{6})/(\sqrt{9x^{12}+4x^{6}}), the highest power of x in the numerator is x6x^6. In the denominator, after simplifying the square root, the highest power of x will also be x6x^6.
  2. Factor out highest power of x: Factor out the highest power of x from the square root in the denominator.\newlineTo simplify the expression, we can factor x6x^6 out of the square root in the denominator, which gives us x69+4x6x^6 \sqrt{9 + \frac{4}{x^{6}}}.
  3. Simplify expression by canceling factors: Simplify the expression by canceling out common factors. The x6x^6 in the numerator and the x6x^6 that was factored out of the square root in the denominator will cancel each other out. This leaves us with (9)/(9+4/x6)(9)/(\sqrt{9 + 4/x^{6}}).
  4. Evaluate limit as xx approaches negative infinity: Evaluate the limit as xx approaches negative infinity.\newlineAs xx approaches negative infinity, the term 4x6\frac{4}{x^{6}} approaches 00 because any finite number divided by an infinitely large number tends to 00. Therefore, the expression inside the square root becomes 9+0\sqrt{9 + 0}, which simplifies to 9\sqrt{9}.
  5. Calculate final value of the limit: Calculate the final value of the limit.\newlineThe final value of the limit is (9)/(9)(9)/(\sqrt{9}), which simplifies to (9)/(3)(9)/(3) because 9\sqrt{9} is 33. Therefore, the limit is 33.