Calculus Examples

$\frac{lim_{x \to 0} e^{x} + e^{- x} - 2}{x^{2}}$

Step 1

Split the limit using the Sum of Limits Rule on the limit as $x$ approaches $0$ .

$\frac{lim_{x \to 0} e^{x} + lim_{x \to 0} e^{- x} - lim_{x \to 0} 2}{x^{2}}$

Step 2

Move the limit into the exponent.

$\frac{e^{lim_{x \to 0} x} + lim_{x \to 0} e^{- x} - lim_{x \to 0} 2}{x^{2}}$

Step 3

Move the limit into the exponent.

$\frac{e^{lim_{x \to 0} x} + e^{lim_{x \to 0} - x} - lim_{x \to 0} 2}{x^{2}}$

Step 4

Move the term $- 1$ outside of the limit because it is constant with respect to $x$ .

$\frac{e^{lim_{x \to 0} x} + e^{- lim_{x \to 0} x} - lim_{x \to 0} 2}{x^{2}}$

Step 5

Evaluate the limit of $2$ which is constant as $x$ approaches $0$ .

$\frac{e^{lim_{x \to 0} x} + e^{- lim_{x \to 0} x} - 1 \cdot 2}{x^{2}}$

Step 6

Evaluate the limits by plugging in $0$ for all occurrences of $x$ .

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Step 6.1

Evaluate the limit of $x$ by plugging in $0$ for $x$ .

$\frac{e^{0} + e^{- lim_{x \to 0} x} - 1 \cdot 2}{x^{2}}$

Step 6.2

Evaluate the limit of $x$ by plugging in $0$ for $x$ .

$\frac{e^{0} + e^{0} - 1 \cdot 2}{x^{2}}$

Step 7

Simplify the answer.

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Step 7.1

Simplify the numerator.

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Step 7.1.1

Anything raised to $0$ is $1$ .

$\frac{1 + e^{0} - 1 \cdot 2}{x^{2}}$

Step 7.1.2

Anything raised to $0$ is $1$ .

$\frac{1 + 1 - 1 \cdot 2}{x^{2}}$

Step 7.1.3

Multiply $- 1$ by $2$ .

$\frac{1 + 1 - 2}{x^{2}}$

Step 7.1.4

Add $1$ and $1$ .

$\frac{2 - 2}{x^{2}}$

Step 7.1.5

Subtract $2$ from $2$ .

$\frac{0}{x^{2}}$

Step 7.2

Divide $0$ by $x^{2}$ .

$0$