Home
Class 10
MATHS
Prove that sqrt(2)+sqrt(5) is irrational...

Prove that `sqrt(2)+sqrt(5)` is irrational.

Text Solution

Verified by Experts

Let us assume that `√2+√5 `is a rational number.
A rational number can be written in the form of p/q where p,q are integers and` q≠0`
`√2+√5 = p/q`
On squaring both sides we get,
...
Promotional Banner

Topper's Solved these Questions

  • QUADRATIC EQUATIONS

    RD SHARMA|Exercise All Questions|390 Videos
  • SOME APPLICATIONS OF TRIGONOMETRY

    RD SHARMA|Exercise All Questions|154 Videos

Similar Questions

Explore conceptually related problems

4.Prove that sqrt(3)+sqrt(5) is irrational.

Prove that sqrt(2)+sqrt(3) is irrational.

Prove that sqrt(3)-sqrt(5) is an irrational number.

Prove that sqrt(3)+sqrt(5) is an irrational number.

Prove that sqrt(3)+sqrt(4) is an irrational number.

Prove that sqrt(p)+sqrt(q) is an irrational,where p and q are primes.

Prove that (sqrt2+ 5sqrt2) is irrational.

prove that sqrt(3)-sqrt(2) is an irrational number.

Prove that quad 3+2sqrt(5) is irrationals:

Prove that 1/(2-sqrt(5)) is an irrational number.

RD SHARMA-REAL NUMBERS-All Questions
  1. A circular field has a circumference of 360km. Three cyclists start ...

    Text Solution

    |

  2. In a morning walk three persons step off together, their steps measure...

    Text Solution

    |

  3. Prove that sqrt(2)+sqrt(5) is irrational.

    Text Solution

    |

  4. Show that there is no positive integer n for which sqrt(n-1)+sqrt(n+1...

    Text Solution

    |

  5. A merchant has 120 litres of oil of one kind, 180 litres of another ...

    Text Solution

    |

  6. Two brands of chocolates are available in packs of 24 and 15 respec...

    Text Solution

    |

  7. What is the largest number that divides 626, 3127 and 15628 and lea...

    Text Solution

    |

  8. Find the greatest number that will divide 445, 572 and 699 leaving ...

    Text Solution

    |

  9. Two tankers contain 850 litres and 680 litres of petrol respectively. ...

    Text Solution

    |

  10. Two sets of English and social science books containing 336 and 96 res...

    Text Solution

    |

  11. Find the HCF of 81 and 237 and express it as a linear combination of 8...

    Text Solution

    |

  12. Find the largest number that will divide 398, 436 and 542 leaving r...

    Text Solution

    |

  13. Let a,b,c,k be rational numbers such that k is not perfect cube if a ...

    Text Solution

    |

  14. Prove that for any prime positive integer p ,sqrt(p) is an irrational ...

    Text Solution

    |

  15. Let A B C D be a tetrahedron such that the edges A B ,A Ca n dA D a...

    Text Solution

    |

  16. 15 Pastries and 12 biscuit packets have been donated for a school fete...

    Text Solution

    |

  17. The length, breadth and height of a room are 8m and 25cm, 6m and 75m ...

    Text Solution

    |

  18. Let a and b be positive integers. Show that sqrt2 always lies between...

    Text Solution

    |

  19. State whether the following are true or not: 3|93 (ii) 6|28 (iii) 0...

    Text Solution

    |

  20. State whether the following are true or not: -7|-35 (ii) 6|6 (iii) ...

    Text Solution

    |