Determine the following limit in simplest form. If the limit is infinite, state that the limit does not exist (DNE).x→∞lim9x4+9x3−8x14+16x+x8Answer:
Q. Determine the following limit in simplest form. If the limit is infinite, state that the limit does not exist (DNE).x→∞lim9x4+9x3−8x14+16x+x8Answer:
Identify highest power: We are given the limit expression:limx→∞(3−8x14+16x+x8)/(9x4+9x)To simplify this limit, we will first identify the highest power of x in the numerator and the denominator.
Divide by x4: The highest power of x in the numerator inside the cube root is x14, and the highest power of x in the denominator is x4. To simplify the limit, we will divide both the numerator and the denominator by x4, the highest power in the denominator.
Factor out x4: We rewrite the limit expression by factoring out x4 from the denominator and x12 (which is (x4)3) from the numerator inside the cube root:x→∞lim(3x12(−8x2+x1016+x41))/(x4(9+x39))
Simplify inside cube root: Now we simplify the expression inside the cube root by dividing each term by x12:x→∞lim(3−8+x2216+x161)/(9+x39)
Ignore terms approaching zero: As x approaches infinity, the terms x2216, x161, and x39 will approach zero. Therefore, we can ignore these terms for the limit calculation: limx→∞(39−8)
Calculate cube root: The cube root of −8 is −2, so the limit simplifies to:x→∞lim9−2
Simplify constant limit: Since −92 is a constant, the limit as x approaches infinity is simply: −92