Q. Find the limit as x approaches negative infinity.x→−∞lim6x3+x216x6−x2=
Identify highest power of x: Identify the highest power of x in the numerator and the denominator.The highest power of x in the numerator is x6 (from the term 16x6), and the highest power of x in the denominator is x3 (from the term 6x3).
Divide by highest power: Divide every term by x3, the highest power of x in the denominator.We get (x316x6−x3x2)/(x36x3+x3x2)=(16x3−x1)/(6+x1).
Simplify expression inside square root: Simplify the expression inside the square root.Since x is approaching negative infinity, x1 approaches 0. Therefore, the term −x1 inside the square root becomes negligible, and we can approximate the expression as 6+x116x3.
Simplify square root: Simplify the square root.The square root of 16x3 is 4x23. So the expression simplifies to 6+x14x23.
Approach negative infinity: As x approaches negative infinity, x1 approaches 0. The term x1 in the denominator becomes negligible, so the expression simplifies to 64x(3/2).
Further simplify expression: Simplify the expression further.Since x(3/2) is the same as (x3)(1/2), we can rewrite the expression as 6x(3/2)4.
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