The number of ordered pairs of positive integral `(x,y)`, that satisfy the equation `(1)/(x)+(1)/(y)=(1)/(2004)`

Number of positive integral solutions of the equation (1)/(x)+(2)/(y)=(1)/(4) is

The number of ordered pairs of integers(x,y) which satisfy x^3 + y^3 = 65 are

The number of positive integral pairs (x, y) satisfying the equation x^(2) - y^(2) = 3370 is :

Q) The number ofpositive integer pairs (x,y) such that (1)/(x)+(1)/(y)=(1)/(2007),x

The number of ordered pair(s) of (x, y) satisfying the equations log_((1+x))(1-2y+y^(2))+log_((1-y))(1+2x+x^(2))=4 and log_((1+x))(1+2y)+log_((1-y))(1+2x)=2

Number of un-order pair solution of (x,y) ofthe equation (1)/(x)+(1)/(y)=(1)/(2007), where x,y in N is