Question
Download Solution PDFComprehension
निर्देश: निम्नलिखित सूचना को पढ़िए और आगे आने वाले दो प्रश्नों के उत्तर दीजिए:
समीकरण xy = ex-y पर विचार कीजिए
x = 1 पर \(\frac{{{d^2}y}}{{d{x^2}}}\) किसके बराबर है?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFअवधारणा:
\(\frac{d}{{dx}}\left( {\frac{u}{v}} \right) = \frac{{v \times \frac{{du}}{{dx}} - u \times \frac{{dv}}{{dx}}}}{{{v^2}}}\)
गणना:
पिछले प्रश्न से हमे प्राप्त होता है, \(\frac{{dy}}{{dx}} = \frac{{\ln x}}{{{{\left( {1 + \ln x} \right)}^2}}}\)
\( \Rightarrow \frac{{{d^2}y}}{{d{x^2}}} = \frac{d}{{dx}}\left( {\frac{{\ln x}}{{{{\left( {1 + \ln x} \right)}^2}}}} \right) = \frac{{\left( {1 + \ln x} \right) \times \frac{1}{x} - 2 \times \ln x \times \left( {1 + \ln x} \right) \times \frac{1}{x}}}{{{{\left( {1 + \ln x} \right)}^4}}}\)
इसलिए, \(\frac{{{d^2}y}}{{d{x^2}}}\;at\;x = 1\;is\;1\)
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