Home
Class 12
MATHS
Prove that : .^(n-1)C(r)+.^(n-2)C(r)+....

Prove that : `.^(n-1)C_(r)+.^(n-2)C_(r)+.^(n-3)C_(r)+.........+.^(r)C_(r)=.^(n)C_(r+1)`.

Text Solution

Verified by Experts

The correct Answer is:
`x=0 or 2`
Promotional Banner

Topper's Solved these Questions

  • BINOMIAL THEOREM

    MOTION|Exercise Exercise -4 (Level - I) ( Previous Year )|12 Videos
  • BINOMIAL THEOREM

    MOTION|Exercise Exercise -4 (Level - II) ( Previous Year )|7 Videos
  • BINOMIAL THEOREM

    MOTION|Exercise Exercise - 2 (Level - II) (Multiple Correct ) (MIXED PROBLEMS )|3 Videos
  • BASIC MATHEMATIC & LOGARITHM

    MOTION|Exercise Exercise - 4|4 Videos
  • CIRCLE

    MOTION|Exercise Exercise - 4 | Level - II (Previous Year | JEE Advanced|22 Videos

Similar Questions

Explore conceptually related problems

Prove that .^(n)C_(r)+^(n)C_(r-1)=^(n+1)C_(r)

Prove that : (""^(n)C_(r+1))/(""^(n)C_(r))=(n-r)/(r+1)

""^(n)C_(r+1)+^(n)C_(r-1)+2.""^(n)C_(r)=

Prove that ^nC_(r)+^(n-1)C_(r)+...+^(r)C_(r)=^(n+1)C_(r+1)

the roots of the equations |{:(.^(x)C_(r),,.^(n-1)C_(r),,.^(n-1)C_(r-1)),(.^(x+1)C_(r),,.^(n)C_(r),,.^(n)C_(r-1)),(.^(x+2)C_(r),,.^(n+1)C_(r),,.^(n+1)C_(r-1)):}|=0

Find the value of the determinant |(.^(n)C_(r-1),.^(n)C_(r),(r+1)^(n+2)C_(r+1)),(.^(n)C_(r),.^(n)C_(r+1),(r+2)^(n+2)C_(r+2)),(.^(n)C_(r+1),.^(n)C_(r+2),(r+3)^(n+2)C_(r+3))|

If .^(n)P_(r)=.^(n)P_(r+1) and .^(n)C_(r)=.^(n)C_(r-1) , find n and r.

MOTION-BINOMIAL THEOREM -Exercise -3 ( Subjective )
  1. Find numerically greatest term in the expansion of (2 + 3 x)^9, when x...

    Text Solution

    |

  2. Find numerically the greatest term in the expansion of (3 - 5x)^(n...

    Text Solution

    |

  3. Prove that : .^(n-1)C(r)+.^(n-2)C(r)+.^(n-3)C(r)+.........+.^(r)C(r)...

    Text Solution

    |

  4. Given s = 1 + q + q^2+. . . . + q^n, Sn = 1 +(q+1 /2)+(q+1 /2)^2+........

    Text Solution

    |

  5. (C(0)+C(1))(C(1)+C(2))(C(2)+C(3))...(C(n-1)+C(n))=(C(0).C(1).C(2)........

    Text Solution

    |

  6. If P(n) denotes the product of all the coefficients in the expansion o...

    Text Solution

    |

  7. Prove that (i) C(1)+2C(2)+3C(3)+……+nC(n)=n.2^(n+1) (ii) C(0)+(C(1)...

    Text Solution

    |

  8. 2.C(0)+(2^(2).C(1))/(2)+(2^(3).C(2))/(3)+(2^(4).C(3))/(4)+......+(2^(n...

    Text Solution

    |

  9. If (1 + x)^(n) = C(0) + C(1) x + C(2) x^(2) + C(3) x^(3) + … + C(n) x...

    Text Solution

    |

  10. (1 + x)^(n) = C(0) + C(1) x + C(2) x^(2) + C(3) x^(3) + … + C(n) x^(n)...

    Text Solution

    |

  11. prove that : C0^2+3C1^@+5C2^2+...+(2n+1)Cn^2=((n+1)2n!)/(n!)^2

    Text Solution

    |

  12. If (1 + x)^(n) = C(0) = C(1) x + C(2) x^(2) + …+ C(n) x^(n) , find...

    Text Solution

    |

  13. Prove that sqrt(C1) +sqrt(C2) +sqrt(C3)+...+sqrt(Cn)le 2^(n-1) +(n-1)/...

    Text Solution

    |

  14. If C(r ) = (n!)/(r!(n - r)!), then prove that sqrt(C(1)) + sqrt(C(2)...

    Text Solution

    |

  15. Sum of all the digits of the coefficient of x^(5) in the expansion of ...

    Text Solution

    |

  16. Find the coefficient of x^(4) in the expansion of (1+x+x^(2)+x^(3))^(1...

    Text Solution

    |

  17. Find the coefficients of x^(4) in the expansions of (2 - x + 3x^(2...

    Text Solution

    |

  18. Let a = (72!)/(36!)^2-1 , then (A) a is odd (B) a is divisible by 7...

    Text Solution

    |

  19. find the sum of the series sum(r=0)^n(-1)^r *"^nCr[1/(2^r)+(3^r)/(2^(...

    Text Solution

    |

  20. Given that (1+x+x^2)^n=a0+a1x+a2x^2+........+a(2n)x^(2n) find the val...

    Text Solution

    |