Q. Find the limit as x approaches negative infinity.x→−∞lim16x4−5x25x2+6x=
Divide by x2: To find the limit of the given function as x approaches negative infinity, we need to analyze the behavior of the numerator and the denominator separately. We will start by simplifying the expression by dividing both the numerator and the denominator by the highest power of x in the denominator, which is x2.
Simplify expression: Divide the numerator and the denominator by x2: x→−∞lim16x4/x2−5x2/x25x2/x2+6x/x2Simplify the expression:x→−∞lim16x2−55+6/x
Remove terms: As x approaches negative infinity, the term x6 in the numerator approaches 0, and the term −x25 in the denominator also approaches 0. Therefore, we can simplify the expression further by removing these terms:x→−∞lim16x25
Simplify square root: Now, we can simplify the square root in the denominator by taking x2 out of the square root, which gives us ∣x∣ (the absolute value of x). Since we are considering the limit as x approaches negative infinity, ∣x∣ will be equal to −x (because x is negative and the absolute value makes it positive):x→−∞lim16⋅∣x∣5x→−∞lim4⋅−x5
Multiply by −41: Simplify the expression by multiplying the numerator by −41 (since we are dividing by −4x):limx→−∞−45⋅x1As x approaches negative infinity, x1 approaches 0. Therefore, the limit of the entire expression as x approaches negative infinity is:−45⋅0=0
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