Calculus Examples

$lim_{x \to - 1} \frac{x^{3} - 5 x + 7}{1 - x + x^{2} - x^{3}}$

Step 1

Split the limit using the Limits Quotient Rule on the limit as $x$ approaches $- 1$ .

$\frac{lim_{x \to - 1} x^{3} - 5 x + 7}{lim_{x \to - 1} 1 - x + x^{2} - x^{3}}$

Step 2

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $- 1$ .

$\frac{lim_{x \to - 1} x^{3} - lim_{x \to - 1} 5 x + lim_{x \to - 1} 7}{lim_{x \to - 1} 1 - x + x^{2} - x^{3}}$

Step 3

Move the exponent $3$ from $x^{3}$ outside the limit using the Limits Power Rule.

$\frac{{(lim_{x \to - 1} x)}^{3} - lim_{x \to - 1} 5 x + lim_{x \to - 1} 7}{lim_{x \to - 1} 1 - x + x^{2} - x^{3}}$

Step 4

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

$\frac{{(lim_{x \to - 1} x)}^{3} - 5 lim_{x \to - 1} x + lim_{x \to - 1} 7}{lim_{x \to - 1} 1 - x + x^{2} - x^{3}}$

Step 5

Evaluate the limit of $7$ which is constant as $x$ approaches $- 1$ .

$\frac{{(lim_{x \to - 1} x)}^{3} - 5 lim_{x \to - 1} x + 7}{lim_{x \to - 1} 1 - x + x^{2} - x^{3}}$

Step 6

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $- 1$ .

$\frac{{(lim_{x \to - 1} x)}^{3} - 5 lim_{x \to - 1} x + 7}{lim_{x \to - 1} 1 - lim_{x \to - 1} x + lim_{x \to - 1} x^{2} - lim_{x \to - 1} x^{3}}$

Step 7

Evaluate the limit of $1$ which is constant as $x$ approaches $- 1$ .

$\frac{{(lim_{x \to - 1} x)}^{3} - 5 lim_{x \to - 1} x + 7}{1 - lim_{x \to - 1} x + lim_{x \to - 1} x^{2} - lim_{x \to - 1} x^{3}}$

Step 8

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

$\frac{{(lim_{x \to - 1} x)}^{3} - 5 lim_{x \to - 1} x + 7}{1 - lim_{x \to - 1} x + {(lim_{x \to - 1} x)}^{2} - lim_{x \to - 1} x^{3}}$

Step 9

Move the exponent $3$ from $x^{3}$ outside the limit using the Limits Power Rule.

$\frac{{(lim_{x \to - 1} x)}^{3} - 5 lim_{x \to - 1} x + 7}{1 - lim_{x \to - 1} x + {(lim_{x \to - 1} x)}^{2} - {(lim_{x \to - 1} x)}^{3}}$

Step 10

Evaluate the limits by plugging in $- 1$ for all occurrences of $x$ .

Tap for more steps...

Step 10.1