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Sagot :
To determine [tex]\(\frac{dy}{dx}\)[/tex] by implicit differentiation for the equation [tex]\(x^2 + y^2 = 1\)[/tex], follow these steps:
1. Start with the given implicit function:
[tex]\[ x^2 + y^2 = 1 \][/tex]
2. Differentiate both sides with respect to [tex]\(x\)[/tex]:
When differentiating implicitly, remember to apply the chain rule to terms involving [tex]\(y\)[/tex], since [tex]\(y\)[/tex] is a function of [tex]\(x\)[/tex].
[tex]\[ \frac{d}{dx}(x^2) + \frac{d}{dx}(y^2) = \frac{d}{dx}(1) \][/tex]
This breaks down as follows:
[tex]\[ \frac{d}{dx}(x^2) + \frac{d}{dx}(y^2) = 0 \][/tex]
The right side is a constant, so its derivative is 0. Now differentiate the left side term by term.
3. Differentiate [tex]\(x^2\)[/tex]:
[tex]\[ \frac{d}{dx}(x^2) = 2x \][/tex]
4. Differentiate [tex]\(y^2\)[/tex]:
Using the chain rule for [tex]\(y^2\)[/tex]:
[tex]\[ \frac{d}{dx}(y^2) = 2y \frac{dy}{dx} \][/tex]
Combine these results:
[tex]\[ 2x + 2y \frac{dy}{dx} = 0 \][/tex]
5. Solve for [tex]\(\frac{dy}{dx}\)[/tex]:
Isolate [tex]\(\frac{dy}{dx}\)[/tex]:
[tex]\[ 2y \frac{dy}{dx} = -2x \][/tex]
Simplify:
[tex]\[ y \frac{dy}{dx} = -x \][/tex]
Finally, solve for [tex]\(\frac{dy}{dx}\)[/tex]:
[tex]\[ \frac{dy}{dx} = -\frac{x}{y} \][/tex]
Thus,
[tex]\[ \boxed{ \frac{dy}{dx} = -\frac{x}{y} } \][/tex]
1. Start with the given implicit function:
[tex]\[ x^2 + y^2 = 1 \][/tex]
2. Differentiate both sides with respect to [tex]\(x\)[/tex]:
When differentiating implicitly, remember to apply the chain rule to terms involving [tex]\(y\)[/tex], since [tex]\(y\)[/tex] is a function of [tex]\(x\)[/tex].
[tex]\[ \frac{d}{dx}(x^2) + \frac{d}{dx}(y^2) = \frac{d}{dx}(1) \][/tex]
This breaks down as follows:
[tex]\[ \frac{d}{dx}(x^2) + \frac{d}{dx}(y^2) = 0 \][/tex]
The right side is a constant, so its derivative is 0. Now differentiate the left side term by term.
3. Differentiate [tex]\(x^2\)[/tex]:
[tex]\[ \frac{d}{dx}(x^2) = 2x \][/tex]
4. Differentiate [tex]\(y^2\)[/tex]:
Using the chain rule for [tex]\(y^2\)[/tex]:
[tex]\[ \frac{d}{dx}(y^2) = 2y \frac{dy}{dx} \][/tex]
Combine these results:
[tex]\[ 2x + 2y \frac{dy}{dx} = 0 \][/tex]
5. Solve for [tex]\(\frac{dy}{dx}\)[/tex]:
Isolate [tex]\(\frac{dy}{dx}\)[/tex]:
[tex]\[ 2y \frac{dy}{dx} = -2x \][/tex]
Simplify:
[tex]\[ y \frac{dy}{dx} = -x \][/tex]
Finally, solve for [tex]\(\frac{dy}{dx}\)[/tex]:
[tex]\[ \frac{dy}{dx} = -\frac{x}{y} \][/tex]
Thus,
[tex]\[ \boxed{ \frac{dy}{dx} = -\frac{x}{y} } \][/tex]
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