Precalculus Examples

$lim_{x \to 1} x - 20$

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

$lim_{x \to 1} x - lim_{x \to 1} 20$

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

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Evaluate the limit of $x$ by plugging in $1$ for $x$ .

$1 - lim_{x \to 1} 20$

Evaluate the limit of $20$ which is constant as $x$ approaches $1$ .

$1 - 20$

Subtract $20$ from $1$ .

$- 19$

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