I know that how ever million places people have searched to it doesn't repeat, but why?
Other Answers:
irrational number
A number that cannot be expressed as a ratio between two integers and is not an imaginary number.
If written in decimal notation, an irrational number would have an infinite number of digits to the right of the decimal point, without repetition. ? and v2 are irrational numbers.
e is an irrational number, as well.
? and e are transcendental numbers. You can look that up...
? is ! There is no why !
QED
Why can't it be expressed as a fraction? I think it's just a characteristic of our number system. Irrational numbers exist in the physical world. For example, the hypotenuse of a right triangle whose 2 shorter sides have a length of one. The hypotenuse is root 2 long, but you can only express root 2 as an unending, non repeating fraction.
Let In(x)=o-1+1( 1-x2) ncos ( a x) dx
Integrating by parts we have
a 2In=2n( 2n-1) In-1-4n( n-1) In-2 ( n? 2)
which implies that
a 2n+1In=n!( Pnsin ( a ) +Qncos ( a ) ) (* )
where Pn,Qn are polynomials of degree <2n+1 in a with integer coefficients.
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