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If xsqrt(1+y)+ysqrt(1+x)=0, prove that (...

If `xsqrt(1+y)+ysqrt(1+x)=0,` prove that `(dy)/(dx)=-1/((1+x)^2)`

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`"We have "xsqrt(1+y)+ysqrt(1+x)=0`
`"or "xsqrt(1+y)=-ysqrt(1+x)`
`"or "x^(2)(1+y)=y^(2)(1+x)" [On squaring both sides]"`
`"or "x^(2)-y^(2)=y^(2)x-x^(2)y`
`"or "(x+y)(x-y)=-xy(x-y)`
`"or "x+y=-xy" "[because x- yne 0" as "x = y" does not satisfy the given equation"]`
`"or "y=-(x)/(1+x)`
`"or "(dy)/(dx)=-{((1+x)xx1-x(0+1))/((1+x^(2)))}=-(1)/((1+x^(2)))`
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CENGAGE-DIFFERENTIATION-Exercise 3.2
  1. If g is the inverse function of fa n df^(prime)(x)=sinx ,t h e ng^(pri...

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  2. sin^(-1) ((2x)/(1 + x^(2)))

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  3. Find (dy)/(dx) in the following : y = tan^(-1)((3x-x^(3))/(1-3x^(2))...

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  4. Find (dy)/(dx) in the following : y= sec^(-1) ((1)/(2x^(2)-1)), 0 lt...

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  5. Find (dy)/(dx) if y=tan^(-1)(4x)/(1+5x^2)+tan^(-1)(2+3x)/(3-2x)

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  6. "F i n d"(dy)/(dx)"if"y=tan^(-1)((sqrt(1+x^2)-1)/x), where x!=0

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  7. y=tan^(-1)(x/(1+sqrt(1-x^2)))

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  8. Find (dy)/(dx) for the function: y=sin^(-1)sqrt((1-x))+cos^(-1)sqrt(x)

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  9. Find (dy)/(dx) for the function: y=sqrt(sinsqrt(x))

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  10. Differentiate : y = e^(sin 2x)

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  11. Find (dy)/(dx) for the function: y=logsqrt(sinsqrt(e^x))

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  12. Find (dy)/(dx) for the function: y=a^((sin^(-1)x))^2

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  13. Find (dy)/(dx) if y=log{e^x((x-2)/(x+2))^(3/4)}

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  14. y=sin^(-1)[sqrt(x-a x)-sqrt(a-a x)] then prove that 1/(2sqrtx sqrt(1-x...

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  15. Find (dy)/(dx) for the functions: y=x^3e^xsinx

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  16. Find (dy)/(dx) for the function: y=(log)esqrt((1+sinx)/(1-sinx)),w h e...

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  17. y=(x+sin x)/(x+cos x)

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  18. If y=(1+x)(1+x^2)(1+x^4)......(1+x^(2n)), then find (dy)/(dx)a tx=0.

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  19. If xsqrt(1+y)+ysqrt(1+x)=0, prove that (dy)/(dx)=-1/((1+x)^2)

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  20. If g is the inverse function of fa n df^(prime)(x)=sinx ,t h e ng^(pri...

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