Q. Find the limit as x approaches negative infinity.x→−∞lim4x+54x2−3x=
Identify highest power of x: Identify the highest power of x in the numerator and denominator.In the expression (4x2−3x)/(4x+5), the highest power of x in the numerator inside the square root is x2, and the highest power of x in the denominator is x.
Divide numerator and denominator: Divide the numerator and the denominator by the highest power of x in the denominator.To simplify the limit, we divide both the numerator and the denominator by x. This gives us the following expression:\lim_{x \rightarrow -\infty}\left(\frac{\sqrt{4x^{2}}/x^2 - 3x/x^2}}{4x/x + 5/x}\right)
Simplify expression inside the limit: Simplify the expression inside the limit.After dividing by x, we get:limx→−∞(4+x54−x3)
Evaluate limit as x approaches negative infinity: Evaluate the limit as x approaches negative infinity.As x approaches negative infinity, the terms −x3 and x5 approach 0. Therefore, the expression simplifies to:limx→−∞(44)
Calculate final value of the limit: Calculate the final value of the limit.The square root of 4 is 2, so the expression becomes:limx→−∞(42)This simplifies to 21.
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