पूर्ण (शुद्ध) करणी के रूप में लिखिएः
(i) `sqrt(x+y)/(x-y)` (ii) `sqrt((x^(3)+y^(3))(x^(2)-y^(2)))`
(iii) `(x-y)sqrt((x+y)/(x-y))` (iv) `x/(y^(2)) 3 sqrt((y^(7))/(x^(2))`

Answer

(i) `1/(x-y)sqrt(x^(2)-y^(2))` (ii)`(x+y)sqrt((x-y)(x^(2)-xy+y^(2)))`
(iii) `sqrt(x^(2)-y^(2))` (iv) `root(xy)`