Question
${{{d^n}} \over {d{x^n}}}(\log x) =$
==>${y_1} = \frac{1}{x}$,${y_2} = \frac{{ - 1}}{{{x^2}}}$, ${y_3} = \frac{2}{{x^3}} $,........,${y_n} = \frac{{{{( - 1)}^{n - 1}}(n - 1)!}}{{{x^n}}}$.
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है, तब $6 \beta$ का मान. . . . . है।
$y = a\,{\cos ^2}x + 2b\,\sin x\cos x + c\,{\sin ^2}x$
तथा $z = a{\sin ^2}x - 2b\sin x\cos x + c{\cos ^2}x,$ हो, तब