`x-y=2andx y=24 ,f i n d1/x+1/y`

If sqrt(x) + sqrt(y)=4, f i n d (dx/dy) a t (y = 1).

If sqrt(x) + sqrt(y)=4, f i n d (dx/dy) a t (y = 1).

Find x and y if: (i) (x + 1,y-2) = (3,1) (ii) (x + 2,4)= (5,2x+y)

If f(x+y+1)={sqrt(f(x))+sqrt(f(y))}^2 and f(0)=1AAx ,y in R ,d e t e r m in ef(n),n in Ndot

If f(x+y)=f(x)+f(y)-x y-1AAx , y in Ra n df(1)=1, then the number of solution of f(n)=n , n in N , is 0 (b) 1 (c) 2 (d) more than 2

If f(x+y)=f(x)+f(y)-x y-1AAx , y in Ra n df(1)=1, then the number of solution of f(n)=n , n in N , is 0 (b) 1 (c) 2 (d) more than 2

If f(x+y)=f(x)+f(y)-x y-1AAx , y in Ra n df(1)=1, then the number of solution of f(n)=n , n in N , is 0 (b) 1 (c) 2 (d) more than 2

Find the real values of x\ a n d\ y ,\ if:(1+i)(x+i y)=2-5i

If y=x^x ,f i n d \ (d^2y)/(dx^2)

The angle between the tangents to the curves y=x^(2)andx=y^(2) at (1,1) is -