Home
Class 12
MATHS
If y=(ax^2)/((x-a)(x-b)(x-c))+(bx)/((x-b...

If `y=(ax^2)/((x-a)(x-b)(x-c))+(bx)/((x-b)(x-c))+c/(x-c)+1` then `(y prime)/y=`

Text Solution

Verified by Experts

`y= (ax^2)/((x-a)(x-b)(x-c)) + (bx)/((x-b)(x-c)) + (c+x-c)/(x-c)`
`= (ax^2)/((x-a)(x-b)(x-c)) + (bx)/((x-b)(x-c)) + x/(x-c)`
`(ax^2)/((x-a)(x-b)(x-c)) + (bx + x(x-b))/((x-b)(x-c))`
`= (ax^2 + x^2(x-1))/((x-a)(x-b)(x-c))`
`y = a^3/((x-a)(x-b)(x-c))`
`log y = logx^3 - { log(x-a) + log(x-b) + log(x-c) }`
`log y = 3 log x - log(x-a) - log(x-b) - log(x-c)`
`1/y * dy/dx = 3/x - 1/(x-a) - 1/(x-b) - 1/(x-c)`
...
Promotional Banner

Topper's Solved these Questions

  • DIFFERENTIALS, ERRORS AND APPROXIMATIONS

    RD SHARMA ENGLISH|Exercise All Questions|107 Videos
  • DIRECTION COSINES AND DIRECTION RATIOS

    RD SHARMA ENGLISH|Exercise All Questions|90 Videos

Similar Questions

Explore conceptually related problems

If y=(ax^2)/((x-a)(x-b)(x-c))+(b x)/((x-b)(x-c))+c/(x-c)+1 , then prove that (y')/y=1/x[a/(a-x)+b/(b-x)+c/(c-x)]

If y=(ax^2)/((x-a)(x-b)(x-c))+(b x)/((x-b)(x-c))+c/(x-c)+1 , then prove that (y')/y=1/x[a/(a-x)+b/(b-x)+c/(c-x)]

Prove that (ax^(2))/((x -a)(x-b)(x-c))+(bx)/((x -b)(x-c))+(c)/(x-c)+1 = (x^(3))/((x-a)(x-b)(x-c)) .

Statement-1: If a, b, c are distinct real numbers, then a((x-b)(x-c))/((a-b)(a-c))+b((x-c)(x-a))/((b-c)(b-a))+c((x-a)(x-b))/((c-a)(c-b))=x for each real x. Statement-2: If a, b, c in R such that ax^(2) + bx + c = 0 for three distinct real values of x, then a = b = c = 0 i.e. ax^(2) + bx + c = 0 for all x in R .

If y=1/(1+x^(a-b)+x^(c-b))+1/(1+x^(b-c)+x^(a-c))+1/(1+x^(b-a)+x^(c-a)), then (dy)/(dx) is equal to (a) 1 (b) (a+b+c)^(x+b+c-1) 0 (d) none of these

If y=1/(1+x^(a-b)+x^(c-b))+1/(1+x^(b-c)+x^(a-c))+1/(1+x^(b-a)+x^(c-a)), then (dy)/(dx) is equal to (a) 1 (b) (a+b+c)^(x+b+c-1) 0 (d) none of these

If y = (1)/(1 + x^(a - b) + x^(c - b)) + (1)/(1 + x^(b-c) + x^(a - c)) + (1)/(1 + x^(b - a) + x^(c - a)) then find (dy)/(dx) at e^(a^(b^(c )))

If y=(a x+b)/(x^2+c), then (2x y_1+y) y_3=

If (x)/(x-y)=log((a)/(x-y)) then (dy)/(dx) is (a) (x)/(y), (b) 2-(x)/(y), (c) 2, (d) (x-y)/(x)

If (logx)/(b-c)=(logy)/(c-a)=(logz)/(a-b) , then which of the following is/are true? z y z=1 (b) x^a y^b z^c=1 x^(b+c)y^(c+b)=1 (d) x y z=x^a y^b z^c

RD SHARMA ENGLISH-DIFFERENTIATION-All Questions
  1. If (sin"x")^y=(cos"y")^x, prove that (dy)/(dx)=(logcosy-ycotx)/(logsin...

    Text Solution

    |

  2. If y^(x)=e^(y-x), then prove that (dy)/(dx) = ((1+logy)^(2))/(logy)

    Text Solution

    |

  3. If y=(ax^2)/((x-a)(x-b)(x-c))+(bx)/((x-b)(x-c))+c/(x-c)+1 then (y prim...

    Text Solution

    |

  4. If x=e^(x/y),prove that(dy)/(dx)=(x-y)/(xlogx)

    Text Solution

    |

  5. If y=xsiny, prove that (dy)/(dx)=y/(x(1-xcosy)

    Text Solution

    |

  6. If x ylog(x+y)=1, prove that (dy)/(dx)=-(y(x^2y+x+y))/(x(x y^2+x+y))

    Text Solution

    |

  7. If (sin"x")^y=x+y ,p rov et h a t(dy)/(dx)=(1-(x+y)ycotx)/((x+y)logsin...

    Text Solution

    |

  8. Differentiate: (logx)^x+x^(logx)w i t hr e s p e c t to x :

    Text Solution

    |

  9. Find the derivative of (sqrt(x)(x+4)^(3/2))/((4x-3)^(4/3)) with respec...

    Text Solution

    |

  10. Differentiate the following functions with respect to x : (cos"x")^x ...

    Text Solution

    |

  11. Differentiate the following functions with respect to x : (i) (x^x...

    Text Solution

    |

  12. If y={(log)(cosx)sinx}{(log)(sinx)cosx}^(-1)+sin^(-1)((2x)/(1+x^2)),f...

    Text Solution

    |

  13. If sqrt(y+x)+sqrt(y-x)=c ,s howt h a t(dy)/(dx)=y/x-sqrt((y^2)/(x^2)-1...

    Text Solution

    |

  14. If y=cos^(-1)sqrt((cos3x)/(cos^3x)),t h e ns howt h a t(dy)/(dx)=sqrt...

    Text Solution

    |

  15. If sqrt(1-x^2)+sqrt(1-y^2)=a(x-y),p rov et h a t(dy)/(dx)=sqrt((1-y^2...

    Text Solution

    |

  16. if x^2+y^2 = t - 1/t and x^4 + y^4 = t^2 + 1/t^2 then prove that dy/dx...

    Text Solution

    |

  17. If y=btan^(-1)(x/a+tan^(-1)y/x),find(dy)/(dx)dot

    Text Solution

    |

  18. Differentiate sin^(-1)((2x)/(1+x^2))+cos^(-1)((1-x^2)/(1+x^2)) with re...

    Text Solution

    |

  19. Differentiate sin^(-1)((2x)/(1+x^2))+cos^(-1)((1-x^2)/(1+x^2)) with re...

    Text Solution

    |

  20. Differentiate the functions with respect to x : tan^(-1){(sqrt(1+a^2x...

    Text Solution

    |