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यदि (If) y*sqrt(x^(2)+1)=log[sqrt(x^(2)+...

यदि (If) `y*sqrt(x^(2)+1)=log[sqrt(x^(2)+1)-x]` दिखाएँ कि `(x^(2)+1)(dy)/(dx)+xy+1=0`

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यहाँ ,`ysqrt(x^(2)+1)=log[sqrt(x^(2)+1)-x]`
दोनों पक्षों को x सापेक्ष अवकलित करने पर , हमें मिलता है
`(dy)/(dx)*sqrt(x^(2)+1)+y*(1)/(2)(x^(2)+1)^(-1/(2))*2x=(1)/(sqrt(x^(2)+1)-x)(d)/(dx)(sqrt(x^(2)+1)-x)`
`rArrsqrt(x^(2)+1)(dy)/(dx)+(xy)/(sqrt(x^(2)+1))=(1)/(sqrt(x^(2)+1)-x)((x)/(sqrt(x^(2)+1))-1)`
`=(1)/(sqrt(x^(2)+1)-x)(x-sqrt(x^(2)+1))/(sqrt(x^(2)+1))=(-1)/(sqrt(x^(2)+1))`
`rArr(x^(2)+1)(dy)/(dx)+xy=-1rArr(x^(2)+1)(dy)/(dx)+xy+1=0`.
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KC SINHA-अवकलन -OBJECTIVE QUESTIONS
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  18. (d)/(dx)[logsqrt((1-cosx)/(1+cosx)) equals

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  19. If y="sin"^(-1)(2x)/(1+x^(2)),0ltxlt1and0ltylt(pi)/(2), then (dy)/(dx)...

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  20. यदि siny=xsin(a+y) तब (dy)/(dx) =

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