Determine the following limit in simplest form. If the limit is infinite, state that the limit does not exist (DNE).x→∞lim7x+3x3313x3+47x7+x10Answer:
Q. Determine the following limit in simplest form. If the limit is infinite, state that the limit does not exist (DNE).x→∞lim7x+3x3313x3+47x7+x10Answer:
Identify highest power: To find the limit of the given expression as x approaches infinity, we should first identify the highest power of x in both the numerator and the denominator to simplify the expression.
Divide by x3: In the numerator, the highest power of x is x10 and in the denominator, the highest power of x is x3. To simplify, we can divide both the numerator and the denominator by x3, the highest power in the denominator.
Simplify expression: After dividing by x3, the expression becomes:limx→∞(3x313x3+x347x7+x3x10)/(x37x+x33x3)This simplifies to:limx→∞(313+47x4+x7)/(x27+3)
Negligible terms: As x approaches infinity, the terms 13 and 3 become negligible compared to the terms with x. Also, x27 approaches 0. So the expression further simplifies to:x→∞lim(347x4+x7)/3
Dominant term: Now, we can see that x7 is the dominant term in the cube root, so we can ignore the 47x4 term as x approaches infinity. The expression now simplifies to:limx→∞(3x7)/3
Final limit: Taking the cube root of x7 gives us x37. So the expression is now:limx→∞3x37
Final limit: Taking the cube root of x7 gives us x37. So the expression is now:limx→∞3x37 As x approaches infinity, x37 also approaches infinity. Therefore, the limit of the expression as x approaches infinity is infinity.
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