Q. Find the limit as x approaches negative infinity.x→−∞lim9x12+4x69x6=
Identify highest power of x: Identify the highest power of x in the numerator and denominator.In the expression (9x6)/(9x12+4x6), the highest power of x in the numerator is x6. In the denominator, after simplifying the square root, the highest power of x will also be x6.
Factor out highest power of x: Factor out the highest power of x from the square root in the denominator.To simplify the expression, we can factor x6 out of the square root in the denominator, which gives us x69+x64.
Simplify expression by canceling factors: Simplify the expression by canceling out common factors. The x6 in the numerator and the x6 that was factored out of the square root in the denominator will cancel each other out. This leaves us with (9)/(9+4/x6).
Evaluate limit as x approaches negative infinity: Evaluate the limit as x approaches negative infinity.As x approaches negative infinity, the term x64 approaches 0 because any finite number divided by an infinitely large number tends to 0. Therefore, the expression inside the square root becomes 9+0, which simplifies to 9.
Calculate final value of the limit: Calculate the final value of the limit.The final value of the limit is (9)/(9), which simplifies to (9)/(3) because 9 is 3. Therefore, the limit is 3.
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