(urgent answer)(Pb)Suppose that y=3x/4 and x^y=y^x. the quantity x+y can be expressed as a rational number r/s, where r and s are relatively prime positive integers {x,y are non-zero real numbers}. The value of (r+s) is :-
1) 107
2) 529
3) 840
4) can't be determined from the given information