Solution: Quotient Rule #2
Solution: Quotient Rule #2
Find the derivative of:
[latex]\Large{y = \frac{x^2-3x+1}{2x^2+5}}[/latex]
Step 1:
We notice that the given function is a quotient of two other functions. To find the derivative of this, we can use the quotient rule. First, let’s label the two functions as:
[latex]\large{f(x) = x^2-3x+1}[/latex] and [latex]\large{g(x) = 2x^2+5}[/latex]
To use the quotient rule, we also need the derivative of these functions. We can easily find the derivatives as:
[latex]\large{f'(x) = 2x-3}[/latex] and [latex]\large{g'(x) = 4x}[/latex]
Step 2:
The quotient rule formula states that:
[latex]\large{\frac{d}{dx}\frac{f(x)}{g(x)} = \frac{g(x)f'(x) – f(x)g'(x)}{g(x)^2}}[/latex]
Thus, substituting into the quotient rule formula, we have:
[latex]\large{\frac{d}{dx}(\frac{x^2-3x+1}{2x^2+5}) = \frac{(2x^2+5)(2x-3) \:- \:(x^2-3x+1)(4x)}{(2x^2+5)^2}}[/latex]
Step 3:
Simplifying, we have:
[latex]\Large{ = \frac{4x^3-6x^2+10x-15-4x^3+12x^2-4x}{(2x^2+5)^2}}[/latex]
[latex]\Large{ = \frac{6x^2+6x-15}{(2x^2+5)^2}}[/latex]
Thus, this is the final answer for the derivative. So:
[latex]\Large{\frac{dy}{dx} = \frac{6x^2+6x-15}{(2x^2+5)^2}}[/latex]
Solution Complete!
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Solution: Quotient Rule #2
Find the derivative of:
[latex]\Large{y = \frac{x^2-3x+1}{2x^2+5}}[/latex]
Step 1:
We notice that the given function is a quotient of two other functions. To find the derivative of this, we can use the quotient rule. First, let’s label the two functions as:
[latex]\large{f(x) = x^2-3x+1}[/latex] and [latex]\large{g(x) = 2x^2+5}[/latex]
To use the quotient rule, we also need the derivative of these functions. We can easily find the derivatives as:
[latex]\large{f'(x) = 2x-3}[/latex] and [latex]\large{g'(x) = 4x}[/latex]
Step 2:
The quotient rule formula states that:
[latex]\large{\frac{d}{dx}\frac{f(x)}{g(x)} = \frac{g(x)f'(x) – f(x)g'(x)}{g(x)^2}}[/latex]
Thus, substituting into the quotient rule formula, we have:
[latex]\large{\frac{d}{dx}(\frac{x^2-3x+1}{2x^2+5})}[/latex]
[latex]\large{ = \frac{(2x^2+5)(2x-3) \:- \:(x^2-3x+1)(4x)}{(2x^2+5)^2}}[/latex]
Step 3:
Simplifying, we have:
[latex]\Large{ = \frac{4x^3-6x^2+10x-15-4x^3+12x^2-4x}{(2x^2+5)^2}}[/latex]
[latex]\Large{ = \frac{6x^2+6x-15}{(2x^2+5)^2}}[/latex]
Thus, this is the final answer for the derivative. So:
[latex]\Large{\frac{dy}{dx} = \frac{6x^2+6x-15}{(2x^2+5)^2}}[/latex]
Solution Complete!
Send us a review!
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