Find the Difference Quotient f(x)=1/(21x)

Math
Consider the difference quotient formula.
Find the components of the definition.
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Evaluate the function at .
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Replace the variable with in the expression.
The final answer is .
Find the components of the definition.
Plug in the components.
Simplify.
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Simplify the numerator.
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To write as a fraction with a common denominator, multiply by .
To write as a fraction with a common denominator, multiply by .
Write each expression with a common denominator of , by multiplying each by an appropriate factor of .
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Multiply and .
Multiply and .
Reorder the factors of .
Combine the numerators over the common denominator.
Rewrite in a factored form.
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Apply the distributive property.
Subtract from .
Subtract from .
Move the negative in front of the fraction.
Multiply the numerator by the reciprocal of the denominator.
Cancel the common factor of .
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Move the leading negative in into the numerator.
Factor out of .
Cancel the common factor.
Rewrite the expression.
Move the negative in front of the fraction.
Find the Difference Quotient f(x)=1/(21x)


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