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यदि (If) x=(3at)/(1+t^(3)),y=(3at^(2))/(...

यदि (If) `x=(3at)/(1+t^(3)),y=(3at^(2))/(1+t^(3)), "t=(1)/(2)` पर `(dy)/(dx)` निकालें।

लिखित उत्तर

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दिया है, `x=(3at)/(1+t^(3))` … (1)
`thereforelogx=log3a+log(1+t^(3))` [लघुगणक लेने पर]
`therefore(1)/(x).(dx)/(dt)=(1)/(t)-(3t^(2))/((1+t^(3)))rArr(dx)/(dt)=(x)/(t)*(1-2t^(3))/((1+t^(3)))`
पुनः `y=(3at^(2))/(1+t^(3))`
`thereforelogy=log3a+2logt-log(1+t^(3))`
`therefore(1)/(y)*(dy)/(dt)=(2)/(t)-(3t^(2))/(1+t^(3))rArr(dy)/(dt)=(y)/(t)*(2-t^(3))/((1+t^(3)))`
अतः `(dy)/(dx)=(dy)/(dt)/(dx)/(dt)=(y)/(t)*(2-t^(3))/((1+t^(3)))/(x)/(t)*(1-2t^(3))/((1+t^(3)))=(t(2-t^(3)))/((1-2t^(3)))" "[because(y)/(x)=t]`
`thereforet=(1)/(2)` पर `(dy)/(dx)=((1)/(2)(2-(1)/(8)))/(1-(1)/(4))=(15)/(16)xx(4)/(3)=(5)/(4)`
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KC SINHA-अवकलन -OBJECTIVE QUESTIONS
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  12. यदि x=acos^(4)theta,y=asin^(4)theta तो (dy)/(dx)है? यदि theta=(3pi)/...

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  13. If siny+e^(-xcosy)=e, then (dy)/(dx), at (1,pi) is

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

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  17. यदि x^(y)=e^(x-y), तब (dy)/(dx)=

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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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  21. निम्नलिखित फलनों का x के सापेक्ष अवकलन कीजिए : sec^(-1).(x^(2)+1)/(x...

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