Home
Class 11
MATHS
Find the value of n such that : "^nP5=...

Find the value of n such that :
`"^nP_5=42 ^nP_3, n>4`.

Promotional Banner

Topper's Solved these Questions

  • MODEL PAPER (14)

    JBD PUBLICATION|Exercise EXERCISE|39 Videos

  • MODEL PAPER (2)

    JBD PUBLICATION|Exercise EXERCISE|41 Videos

Similar Questions

Explore conceptually related problems

Find the value of n such that : ('^nP_4)/("^(n-1)P_4)= 5/3, n>4 .

Prove that : "^nP_n= 2^nP_(n-2) .

Find the value of n , if (2n - 1)/(n - 2) = 3

Find n if "^nP_4 = 20 ^nP_2 .

Find the value of n , if ((n - 1)!)/(n!) = 1/9

Find n if : "^(2n)P_3=100 ^nP_2 .

Find the least value of n for which the sum 1 + 3 + 3^2 +...... to n terms is greater than 7000.

Determine the value of n if ^(n)C_3: ^nC_2=5:1 .

JBD PUBLICATION-MODEL PAPER (15)-EXERCISE
  1. Prove that A^c-B^c=B-A.

    Text Solution

    |

  2. If f(x)=log(x/(x-1)), show that f(x+1)+f(x)=log ((x+1)/(x-1))

    Text Solution

    |

  3. Prove that:cos15^@-sin15^@=1/sqrt2

    Text Solution

    |

  4. Prove that : cos 24^@+ cos 55^@ + cos 125^@ + cos204^@ + cos 300^@= 1/...

    Text Solution

    |

  5. How many words, with or without meaning, each of 2 vowels and 3 conson...

    Text Solution

    |

  6. Find the value of n such that : "^nP5=42 ^nP3, n>4.

    Text Solution

    |

  7. Sum of first p,q and r terms of an A.P. are a,b,c respectively. Prove...

    Text Solution

    |

  8. If the angle between two lines is pi/3 and slope of one of the line is...

    Text Solution

    |

  9. If a parabolic reflector is 20 cm in diameter and 50 cm deep. Find the...

    Text Solution

    |

  10. Evaluate: underset(xrarr1)lim ((x+x^2+x^3+……….x^n)-n)/(x-1)

    Text Solution

    |

  11. If y=asinx+bcosx, prove thaty^2+((dy)/(dx))^2=a^2+b^2

    Text Solution

    |

  12. A,B and C are three mutually exclusive and exhaustive events associat...

    Text Solution

    |

  13. Find theta such that (3+2i sin theta)/(1-2i sin theta) is purely real.

    Text Solution

    |

  14. If a + ib = ((x+i)^2)/(2x^2+1), prove that a^2+b^2 =((x^2+1)^2)/((2x^2...

    Text Solution

    |

  15. Solve the following system of inequalities graphically: 4x + 3y le 60,...

    Text Solution

    |

  16. IQ of a person is given by the formula IQ= (MA)/(CA)xx100 , where MA i...

    Text Solution

    |

  17. Evaluate: underset(xrarr0)lim (sqrt(1+2x)-sqrt(1-2x))/(x)

    Text Solution

    |

  18. Find the derivative of cos x w.r.t. x

    Text Solution

    |

  19. Find the mean marks from the following data :

    Text Solution

    |

  20. Find the mean deviation from the mean for the following data. 38, 70, ...

    Text Solution

    |