If `(x,2p+q)=(y,p+2q)` then p-q=_______

If 2p+q=11 and p+2q=13, then p+q=

If x^p y^q = (x+y)^(p+q) , then( d^2y)/(d x^2 ) =..........

If p=3 and q=2 , then (3p-4q)^(q-p)div(4p-3q)^(2q-p) =_______

If x^(p) y^(q) = (x + y)^((p + q)) " then " (dy)/(dx)= ?

If x^(p) y^(q) = (x + y)^((p + q)) " then " (dy)/(dx)= ?

If x^(p) y^(q) = (x + y)^((p + q)) " then " (dy)/(dx)= ?

If the difference of the roots of x^2-p x+q=0 is unity, then a) p^2+4q=1 b) p^2-4q=1 c) p^2+4q^2=(1+2q)^2 d) 4p^2+q^2=(1+2p)^2

If x=(p+q)/(p-q) and y=(p-q)/(p+q) then the value of (x-y)/(x+y) is