If curve `y = 1 - ax^2 and y = x^2` intersect orthogonally then the value of a is

If curve x^2=9a(9-y) and x^2=a(y+1) intersect orthogonally then value of 'a' is

If curve x^(2)=9a(9-y) and x^(2)=a(y+1) intersect orthogonally then value of 'a' is

If the curves x^(2)=9A(9-y)andx^(2)=A(y+1) intersect orthogonally, then the value of A is

If curves y^2=6x and 9x^2+by^2=16 intersect orthogonally, then b is equal to

The curves ax^2+by^2=1 and Ax^2+By^2=1 intersect orthogonally, then

If the curves ay + x^(2) =7 and x^(3) =y cut orthogonally at (1,1) then the value of a is

If the curves ay + x^(2) = 7 and y = x^(3) cut orthogonally at (1,1) , then the value of a is

If the curve ax^(2) + 3y^(2) = 1 and 2x^2 + 6y^2 = 1 cut each other orthogonally then the value of 2a :

The curves 2x^(2) + 3y^(2) = 1 and cx^(2) + 4y^(2) = 1 cut each other orthogonally then the value of c is:

If the curves y=2\ e^x and y=a e^(-x) intersect orthogonally, then a= (a)1//2 (b) -1//2 (c) 2 (d) 2e^2