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y = sin(x2+5). Find dy/dx.

Mathematics

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Answer

2xcos⁡(x2+5)2x \cos(x^2 + 5)

Graph of y = sin(x² + 5)

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Key points of y = sin(x² + 5)
Pointxy
Maximum−3.021
x-intercept−2.750
Minimum−2.45−1
x-intercept−2.10
Maximum−1.691
x-intercept−1.130
Minimum0−0.96
x-intercept1.130
Maximum1.691
x-intercept2.10
Minimum2.45−1
x-intercept2.750
Maximum3.021

Step-by-step solution

5 steps

यहाँ दिए गए फलन का अवकलज ज्ञात करने के लिए, हम चेन रूल (chain rule) का उपयोग करेंगे।

दिया गया फलन है:

y=sin⁡(x2+5)y = \sin(x^2 + 5)
  1. चेन रूल लागू करें।

    चेन रूल के अनुसार, यदि y=f(g(x))y = f(g(x)) है, तो dydx=f′(g(x))⋅g′(x)\frac{dy}{dx} = f'(g(x)) \cdot g'(x) होता है।
    यहाँ, f(u)=sin⁡(u)f(u) = \sin(u) और g(x)=x2+5g(x) = x^2 + 5 है।

  2. बाहरी फलन का अवकलज ज्ञात करें।

    ddu(sin⁡(u))=cos⁡(u)\frac{d}{du}(\sin(u)) = \cos(u)

  3. आंतरिक फलन का अवकलज ज्ञात करें।

    ddx(x2+5)=ddx(x2)+ddx(5)=2x+0=2x\frac{d}{dx}(x^2 + 5) = \frac{d}{dx}(x^2) + \frac{d}{dx}(5) = 2x + 0 = 2x

  4. दोनों अवकलजों को गुणा करें।

    dydx=cos⁡(x2+5)⋅(2x)\frac{dy}{dx} = \cos(x^2 + 5) \cdot (2x)
  5. परिणाम को सरल करें।

    dydx=2xcos⁡(x2+5)\frac{dy}{dx} = 2x \cos(x^2 + 5)

    अतः, y=sin⁡(x2+5)y = \sin(x^2 + 5) का अवकलज है:

    2xcos⁡(x2+5)2x \cos(x^2 + 5)
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