Calculus Examples

$lim_{x \to 8} \frac{4 x^{4} - 3 x^{2}}{8 x^{4} + 5 x^{2} + 4 x}$

Step 1

Split the limit using the Limits Quotient Rule on the limit as $x$ approaches $8$ .

$\frac{lim_{x \to 8} 4 x^{4} - 3 x^{2}}{lim_{x \to 8} 8 x^{4} + 5 x^{2} + 4 x}$

Step 2

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $8$ .

$\frac{lim_{x \to 8} 4 x^{4} - lim_{x \to 8} 3 x^{2}}{lim_{x \to 8} 8 x^{4} + 5 x^{2} + 4 x}$

Step 3

Move the term $4$ outside of the limit because it is constant with respect to $x$ .

$\frac{4 lim_{x \to 8} x^{4} - lim_{x \to 8} 3 x^{2}}{lim_{x \to 8} 8 x^{4} + 5 x^{2} + 4 x}$

Step 4

Move the exponent $4$ from $x^{4}$ outside the limit using the Limits Power Rule.

$\frac{4 {(lim_{x \to 8} x)}^{4} - lim_{x \to 8} 3 x^{2}}{lim_{x \to 8} 8 x^{4} + 5 x^{2} + 4 x}$

Step 5

Move the term $3$ outside of the limit because it is constant with respect to $x$ .

$\frac{4 {(lim_{x \to 8} x)}^{4} - 3 lim_{x \to 8} x^{2}}{lim_{x \to 8} 8 x^{4} + 5 x^{2} + 4 x}$

Step 6

Move the exponent $2$ from $x^{2}$ outside the limit using the Limits Power Rule.

$\frac{4 {(lim_{x \to 8} x)}^{4} - 3 {(lim_{x \to 8} x)}^{2}}{lim_{x \to 8} 8 x^{4} + 5 x^{2} + 4 x}$

Step 7

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $8$ .

$\frac{4 {(lim_{x \to 8} x)}^{4} - 3 {(lim_{x \to 8} x)}^{2}}{lim_{x \to 8} 8 x^{4} + lim_{x \to 8} 5 x^{2} + lim_{x \to 8} 4 x}$

Step 8

Move the term $8$ outside of the limit because it is constant with respect to $x$ .

$\frac{4 {(lim_{x \to 8} x)}^{4} - 3 {(lim_{x \to 8} x)}^{2}}{8 lim_{x \to 8} x^{4} + lim_{x \to 8} 5 x^{2} + lim_{x \to 8} 4 x}$

Step 9

Move the exponent $4$ from $x^{4}$ outside the limit using the Limits Power Rule.

$\frac{4 {(lim_{x \to 8} x)}^{4} - 3 {(lim_{x \to 8} x)}^{2}}{8 {(lim_{x \to 8} x)}^{4} + lim_{x \to 8} 5 x^{2} + lim_{x \to 8} 4 x}$

Step 10

Move the term $5$ outside of the limit because it is constant with respect to $x$ .

$\frac{4 {(lim_{x \to 8} x)}^{4} - 3 {(lim_{x \to 8} x)}^{2}}{8 {(lim_{x \to 8} x)}^{4} + 5 lim_{x \to 8} x^{2} + lim_{x \to 8} 4 x}$

Step 11

Move the exponent $2$ from $x^{2}$ outside the limit using the Limits Power Rule.

$\frac{4 {(lim_{x \to 8} x)}^{4} - 3 {(lim_{x \to 8} x)}^{2}}{8 {(lim_{x \to 8} x)}^{4} + 5 {(lim_{x \to 8} x)}^{2} + lim_{x \to 8} 4 x}$

Step 12

Move the term $4$ outside of the limit because it is constant with respect to $x$ .

$\frac{4 {(lim_{x \to 8} x)}^{4} - 3 {(lim_{x \to 8} x)}^{2}}{8 {(lim_{x \to 8} x)}^{4} + 5 {(lim_{x \to 8} x)}^{2} + 4 lim_{x \to 8} x}$

Step 13

Evaluate the limits by plugging in $8$ for all occurrences of $x$ .

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Step 13.1