# What is rational no and how we can solve it by using contradiction method only explain method ................urgent test is tomorrow

1
by Deleted account

2014-08-27T17:34:26+05:30

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Rational number is a real number which can be expressed as a ratio of two integer numbers.

For example,

Certain numbers like √2 is not expressible in the form of ratio of integers. So it is not a rational number.All fractional numbers and integers are rational numbers.

All rational numbers can be expressed as ratio of two integers that are co-prime (relatively prime to each other). That means that, the integers do not have common factors.

When we have to prove  x is a rational number, then assume that . Then after squaring or repeated multiplication or arithmetic operations or rationalization, if you can prove that p and q are not integers or some other rule about factorization is violated, then our assumption about\ is wrong.

This is the contradiction method. You assume and arrive at a contradiction.

If q has a factor(2√5-3), then it is not an integer.

u r welcome to give questions and i am ready answer. why u say: no no
sir student is just a ant ......... you are guru
u r very humble. nice person. nice to meet. u . when u get a question - just message the question number to me in the profile . okay. bye
thanks sir ......
thanks u r welcome