Calculus Examples

$lim_{x \to \frac{1}{2}} \frac{6 x^{2} + x - 1}{4 x^{2} - 4 x - 3}$

Step 1

Split the limit using the Limits Quotient Rule on the limit as $x$ approaches $\frac{1}{2}$ .

$\frac{lim_{x \to \frac{1}{2}} 6 x^{2} + x - 1}{lim_{x \to \frac{1}{2}} 4 x^{2} - 4 x - 3}$

Step 2

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $\frac{1}{2}$ .

$\frac{lim_{x \to \frac{1}{2}} 6 x^{2} + lim_{x \to \frac{1}{2}} x - lim_{x \to \frac{1}{2}} 1}{lim_{x \to \frac{1}{2}} 4 x^{2} - 4 x - 3}$

Step 3

Move the term $6$ outside of the limit because it is constant with respect to $x$ .

$\frac{6 lim_{x \to \frac{1}{2}} x^{2} + lim_{x \to \frac{1}{2}} x - lim_{x \to \frac{1}{2}} 1}{lim_{x \to \frac{1}{2}} 4 x^{2} - 4 x - 3}$

Step 4

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

$\frac{6 {(lim_{x \to \frac{1}{2}} x)}^{2} + lim_{x \to \frac{1}{2}} x - lim_{x \to \frac{1}{2}} 1}{lim_{x \to \frac{1}{2}} 4 x^{2} - 4 x - 3}$

Step 5

Evaluate the limit of $1$ which is constant as $x$ approaches $\frac{1}{2}$ .

$\frac{6 {(lim_{x \to \frac{1}{2}} x)}^{2} + lim_{x \to \frac{1}{2}} x - 1 \cdot 1}{lim_{x \to \frac{1}{2}} 4 x^{2} - 4 x - 3}$

Step 6

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $\frac{1}{2}$ .

$\frac{6 {(lim_{x \to \frac{1}{2}} x)}^{2} + lim_{x \to \frac{1}{2}} x - 1 \cdot 1}{lim_{x \to \frac{1}{2}} 4 x^{2} - lim_{x \to \frac{1}{2}} 4 x - lim_{x \to \frac{1}{2}} 3}$

Step 7

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

$\frac{6 {(lim_{x \to \frac{1}{2}} x)}^{2} + lim_{x \to \frac{1}{2}} x - 1 \cdot 1}{4 lim_{x \to \frac{1}{2}} x^{2} - lim_{x \to \frac{1}{2}} 4 x - lim_{x \to \frac{1}{2}} 3}$

Step 8

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

$\frac{6 {(lim_{x \to \frac{1}{2}} x)}^{2} + lim_{x \to \frac{1}{2}} x - 1 \cdot 1}{4 {(lim_{x \to \frac{1}{2}} x)}^{2} - lim_{x \to \frac{1}{2}} 4 x - lim_{x \to \frac{1}{2}} 3}$

Step 9

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

$\frac{6 {(lim_{x \to \frac{1}{2}} x)}^{2} + lim_{x \to \frac{1}{2}} x - 1 \cdot 1}{4 {(lim_{x \to \frac{1}{2}} x)}^{2} - 4 lim_{x \to \frac{1}{2}} x - lim_{x \to \frac{1}{2}} 3}$

Step 10

Evaluate the limit of $3$ which is constant as $x$ approaches $\frac{1}{2}$ .

$\frac{6 {(lim_{x \to \frac{1}{2}} x)}^{2} + lim_{x \to \frac{1}{2}} x - 1 \cdot 1}{4 {(lim_{x \to \frac{1}{2}} x)}^{2} - 4 lim_{x \to \frac{1}{2}} x - 1 \cdot 3}$

Step 11

Evaluate the limits by plugging in $\frac{1}{2}$ for all occurrences of $x$ .

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Step 11.1

Evaluate the limit of $x$ by plugging in $\frac{1}{2}$ for $x$ .

$\frac{6 {(\frac{1}{2})}^{2} + lim_{x \to \frac{1}{2}} x - 1 \cdot 1}{4 {(lim_{x \to \frac{1}{2}} x)}^{2} - 4 lim_{x \to \frac{1}{2}} x - 1 \cdot 3}$

Step 11.2

Evaluate the limit of $x$ by plugging in $\frac{1}{2}$ for $x$ .

$\frac{6 {(\frac{1}{2})}^{2} + \frac{1}{2} - 1 \cdot 1}{4 {(lim_{x \to \frac{1}{2}} x)}^{2} - 4 lim_{x \to \frac{1}{2}} x - 1 \cdot 3}$

Step 11.3

Evaluate the limit of $x$ by plugging in $\frac{1}{2}$ for $x$ .

$\frac{6 {(\frac{1}{2})}^{2} + \frac{1}{2} - 1 \cdot 1}{4 {(\frac{1}{2})}^{2} - 4 lim_{x \to \frac{1}{2}} x - 1 \cdot 3}$

Step 11.4

Evaluate the limit of $x$ by plugging in $\frac{1}{2}$ for $x$ .

$\frac{6 {(\frac{1}{2})}^{2} + \frac{1}{2} - 1 \cdot 1}{4 {(\frac{1}{2})}^{2} - 4 (\frac{1}{2}) - 1 \cdot 3}$

Step 12

Simplify the answer.

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Step 12.1

Multiply the numerator and denominator of the fraction by $2$ .

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Step 12.1.1

Multiply $\frac{6 {(\frac{1}{2})}^{2} + \frac{1}{2} - 1 \cdot 1}{4 {(\frac{1}{2})}^{2} - 4 (\frac{1}{2}) - 1 \cdot 3}$ by $\frac{2}{2}$ .

$\frac{2}{2} \cdot \frac{6 {(\frac{1}{2})}^{2} + \frac{1}{2} - 1 \cdot 1}{4 {(\frac{1}{2})}^{2} - 4 (\frac{1}{2}) - 1 \cdot 3}$

Step 12.1.2

Combine.

$\frac{2 (6 {(\frac{1}{2})}^{2} + \frac{1}{2} - 1 \cdot 1)}{2 (4 {(\frac{1}{2})}^{2} - 4 (\frac{1}{2}) - 1 \cdot 3)}$

Step 12.2

Apply the distributive property.

$\frac{2 (6 {(\frac{1}{2})}^{2}) + 2 (\frac{1}{2}) + 2 (- 1 \cdot 1)}{2 (4 {(\frac{1}{2})}^{2}) + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.3

Cancel the common factor of $2$ .

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Step 12.3.1

Cancel the common factor.

$\frac{2 (6 {(\frac{1}{2})}^{2}) + 2 (\frac{1}{2}) + 2 (- 1 \cdot 1)}{2 (4 {(\frac{1}{2})}^{2}) + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.3.2

Rewrite the expression.

$\frac{2 (6 {(\frac{1}{2})}^{2}) + 1 + 2 (- 1 \cdot 1)}{2 (4 {(\frac{1}{2})}^{2}) + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.4

Simplify the numerator.

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Step 12.4.1

Multiply $2$ by $6$ .

$\frac{12 {(\frac{1}{2})}^{2} + 1 + 2 (- 1 \cdot 1)}{2 \cdot 4 {(\frac{1}{2})}^{2} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.4.2

Apply the product rule to $\frac{1}{2}$ .

$\frac{12 \frac{1^{2}}{2^{2}} + 1 + 2 (- 1 \cdot 1)}{2 \cdot 4 {(\frac{1}{2})}^{2} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.4.3

One to any power is one.

$\frac{12 \frac{1}{2^{2}} + 1 + 2 (- 1 \cdot 1)}{2 \cdot 4 {(\frac{1}{2})}^{2} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.4.4

Raise $2$ to the power of $2$ .

$\frac{12 (\frac{1}{4}) + 1 + 2 (- 1 \cdot 1)}{2 \cdot 4 {(\frac{1}{2})}^{2} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.4.5

Cancel the common factor of $4$ .

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Step 12.4.5.1

Factor $4$ out of $12$ .

$\frac{4 (3) \frac{1}{4} + 1 + 2 (- 1 \cdot 1)}{2 \cdot 4 {(\frac{1}{2})}^{2} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.4.5.2

Cancel the common factor.

$\frac{4 \cdot 3 \frac{1}{4} + 1 + 2 (- 1 \cdot 1)}{2 \cdot 4 {(\frac{1}{2})}^{2} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.4.5.3

Rewrite the expression.

$\frac{3 + 1 + 2 (- 1 \cdot 1)}{2 \cdot 4 {(\frac{1}{2})}^{2} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.4.6

Multiply $2 (- 1 \cdot 1)$ .

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Step 12.4.6.1

Multiply $- 1$ by $1$ .

$\frac{3 + 1 + 2 \cdot - 1}{2 \cdot 4 {(\frac{1}{2})}^{2} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.4.6.2

Multiply $2$ by $- 1$ .

$\frac{3 + 1 - 2}{2 \cdot 4 {(\frac{1}{2})}^{2} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.4.7

Add $3$ and $1$ .

$\frac{4 - 2}{2 \cdot 4 {(\frac{1}{2})}^{2} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.4.8

Subtract $2$ from $4$ .

$\frac{2}{2 \cdot 4 {(\frac{1}{2})}^{2} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.5

Simplify the denominator.

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Step 12.5.1

Multiply $2$ by $4$ .

$\frac{2}{8 {(\frac{1}{2})}^{2} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.5.2

Apply the product rule to $\frac{1}{2}$ .

$\frac{2}{8 \frac{1^{2}}{2^{2}} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.5.3

One to any power is one.

$\frac{2}{8 \frac{1}{2^{2}} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.5.4

Raise $2$ to the power of $2$ .

$\frac{2}{8 (\frac{1}{4}) + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.5.5

Cancel the common factor of $4$ .

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Step 12.5.5.1

Factor $4$ out of $8$ .

$\frac{2}{4 (2) \frac{1}{4} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.5.5.2

Cancel the common factor.

$\frac{2}{4 \cdot 2 \frac{1}{4} + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.5.5.3

Rewrite the expression.

$\frac{2}{2 + 2 (- 4 (\frac{1}{2})) + 2 (- 1 \cdot 3)}$

Step 12.5.6

Cancel the common factor of $2$ .

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Step 12.5.6.1

Factor $2$ out of $- 4$ .

$\frac{2}{2 + 2 (2 (- 2) \frac{1}{2}) + 2 (- 1 \cdot 3)}$

Step 12.5.6.2

Cancel the common factor.

$\frac{2}{2 + 2 (2 \cdot - 2 \frac{1}{2}) + 2 (- 1 \cdot 3)}$

Step 12.5.6.3

Rewrite the expression.

$\frac{2}{2 + 2 \cdot - 2 + 2 (- 1 \cdot 3)}$

Step 12.5.7

Multiply $2$ by $- 2$ .

$\frac{2}{2 - 4 + 2 (- 1 \cdot 3)}$

Step 12.5.8

Multiply $2 (- 1 \cdot 3)$ .

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Step 12.5.8.1

Multiply $- 1$ by $3$ .

$\frac{2}{2 - 4 + 2 \cdot - 3}$

Step 12.5.8.2

Multiply $2$ by $- 3$ .

$\frac{2}{2 - 4 - 6}$

Step 12.5.9

Subtract $4$ from $2$ .

$\frac{2}{- 2 - 6}$

Step 12.5.10

Subtract $6$ from $- 2$ .

$\frac{2}{- 8}$

Step 12.6

Cancel the common factor of $2$ and $- 8$ .

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Step 12.6.1

Factor $2$ out of $2$ .

$\frac{2 (1)}{- 8}$

Step 12.6.2

Cancel the common factors.

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Step 12.6.2.1

Factor $2$ out of $- 8$ .

$\frac{2 \cdot 1}{2 \cdot - 4}$

Step 12.6.2.2

Cancel the common factor.

$\frac{2 \cdot 1}{2 \cdot - 4}$

Step 12.6.2.3

Rewrite the expression.

$\frac{1}{- 4}$

Step 12.7

Move the negative in front of the fraction.

$- \frac{1}{4}$

Step 13

The result can be shown in multiple forms.

Exact Form:

$- \frac{1}{4}$

Decimal Form:

$- 0.25$