Home
Class 11
MATHS
Using binomial theorem expand (1+x/2-2/x...

Using binomial theorem expand `(1+x/2-2/x)^4,\ x!=0.`

Text Solution

Verified by Experts

The correct Answer is:
N/a

`(1+(x)/(2)-(2)/(x))^(4)`
`=(1+y)^(4) " where " y=(x)/(2)-(2)/(x)`
`=overset(4)underset(r=0)(Sigma).^(4)C_(r)(1)^(4-r).y^(r) =overset(4)underset(r=0)(Sigma).^(4)C_(r).y^(r)`
`=^(4)C_(0).y^(0) +^(4)C_(1).y^(1)+^(4)C_(2).y^(2)+^(4)C_(3).y^(3)+^(4)C_(4).y^(4)`
`=1+4y+6y^(2)+4y^(3)+y^(4)`
`=1+4((x)/(2)-(2)/(x))+6(x^(2)/(2)-(2)/(x))^(2)+4((x)/(2)-(2)/(x))^(3)+((x)/(2)-(2)/(x))^(4)`
`=1+(2x-(8)/(x))+6(x^(2)/(4)-2+(4)/(x^(2)))`
` +4(x^(3)/(8)-(3x)/(2)+(6)/(x)-(8)/(x^(3)))+((x)/(2))^(4)-^(4)C_(1)((x)/(2))^(3).(2)/(x)`
`+^(4)C_(2)((x)/(2))^(2).((2)/(x))^(2)-^(4)C_(3).(x)/(2)((2)/(x))^(3)+((2)/(x))^(4)]`
`=1+2x-(8)/(x)+(3x^(2))/(2)-12+(24)/(x^(2))+(x^(3))/(2)`
`=6x+(24)/(x)-(32)/(x^(3))+(x^(4))/(16) -x^(2)+6 -(16)/(x^(2))+(16)/(x^(4))`
`={-5-4x+(x^(2))/2+(x^(3))/(2)+(x^(4))/(16)+(16)/(x)+(8)/(x^(2))-(32)/(x^(3))+(16)/(x^(4))}`
Promotional Banner

Topper's Solved these Questions

  • BINOMIAL THEOREM

    NAGEEN PRAKASHAN ENGLISH|Exercise Exericse 8.2|24 Videos
  • COMPLEX NUMBERS AND QUADRATIC EQUATION

    NAGEEN PRAKASHAN ENGLISH|Exercise MISCELLANEOUS EXERCISE|20 Videos

Similar Questions

Explore conceptually related problems

By using binomial theorem, expand: (1+x+x^2)^3

Using binomial theorem, expand (x+1/y)^(11)dot

Expand the following by binomial theorem: (x^2+2/x)^4, x!=0

Expand using Binomial Theorem (1+x/2-2/x)^4,x!=0.

Using binomial theorem expand (x^(2)+(1)/(x^(2)))^(4)

Expand the following by binomial theorem: (x^2+3/x)^5, x!=0

Using binomial theorem, expand [ ( x+y)^(5) + (x-y)^(5) ] and hence find the value of [ ( sqrt(3) + 1)^(5) - ( sqrt(3) - 1)^(5) ] .

Expand using binomial theorem: (i) (1-2x)^(4)

Using binomial theorem, evaluate : (101)^4

Using binomial theorem compute : (10. 1)^5

NAGEEN PRAKASHAN ENGLISH-BINOMIAL THEOREM-Miscellaneous Exericse
  1. Find a, b and n in the expansion of (a+b)^nif the first three terms ...

    Text Solution

    |

  2. If the coefficients of x^2a n d\ x^3 in the expansion o (3+a x)^9 are ...

    Text Solution

    |

  3. Find the coefficient of a^4 in the product (1+a)^4(2-a)^5 using binomi...

    Text Solution

    |

  4. If a and b are distinct integers, prove that a - b is a factor of a^n-...

    Text Solution

    |

  5. Evaluate (sqrt(3)+sqrt(2))^6-(sqrt(3)-sqrt(2))^6dot

    Text Solution

    |

  6. Find the value of (a^2+sqrt(a^2-1))^4+(a^2-sqrt(a^2-1))^4.

    Text Solution

    |

  7. Find an approximation of (0. 99)^5 using the first three terms of its ...

    Text Solution

    |

  8. Find n, if the ratio of the fifth term from the beginning to the fi...

    Text Solution

    |

  9. Using binomial theorem expand (1+x/2-2/x)^4,\ x!=0.

    Text Solution

    |

  10. Find the expansion of (3x^2-2a x+3a^2)^3 using binomial theorem.

    Text Solution

    |

  11. Find a, b and n in the expansion of (a+b)^nif the first three terms ...

    Text Solution

    |

  12. If the coefficients of x^2a n d\ x^3 in the expansion o (3+a x)^9 are ...

    Text Solution

    |

  13. Find the coefficient of x^5 in the expansion of (1 + 2x)^6 (1-x)^7.

    Text Solution

    |

  14. If a and b are distinct integers, prove that a - b is a factor of a^n-...

    Text Solution

    |

  15. Evaluate (sqrt(3)+sqrt(2))^6-(sqrt(3)-sqrt(2))^6dot

    Text Solution

    |

  16. Find the value of (a^2+sqrt(a^2-1))^4+(a^2-sqrt(a^2-1))^4.

    Text Solution

    |

  17. Find an approximation of (0. 99)^5using the first three terms of its ...

    Text Solution

    |

  18. Find n, if the ratio of the fifth term from the beginning to the fi...

    Text Solution

    |

  19. Expand using Binomial Theorem (1+x/2-2/x)^4,x!=0.

    Text Solution

    |

  20. Find the expansion of (3x^2-2a x+3a^2)^3 using binomial theorem.

    Text Solution

    |