# maths

posted by
**illeana**
.

1 if x+1/x=2 then x^2012+1/x^2012=........

2 if A > B > C > D, find the digits A,B,C,D which are from 1 to 9 so that ABCD-DCBA=BDAC

3 solve x+y=28 xy=127

posted by
**illeana**
.

1 if x+1/x=2 then x^2012+1/x^2012=........

2 if A > B > C > D, find the digits A,B,C,D which are from 1 to 9 so that ABCD-DCBA=BDAC

3 solve x+y=28 xy=127