The curve given by `x+y=e^(xy)` has a tangent parallel to the y-axis at the point

The curve given by x+y=e^(x y) has a tangent parallel to the y-axis at the point (a) (0,1) (b) (1,0) (c) (1,1) (d) none of these

The curve given by x+y=e^(x y) has a tangent parallel to the y - axis at the point (0,1) (b) (1,0) (c) (1,1) (d) none of these

The curve given by x+y=e^(x y) has a tangent parallel to the y-axis at the point (a) (0,1) (b) (1,0) (c) (1,1) (d) none of these

The curve given by x+y=e^(x y) has a tangent parallel to the y- axis at the point (a) (0,1) (b) (1,0) (c) (1,1) (d) none of these

For the curve x^(2)+4xy+8y^(2)=64 the tangents are parallel to the x-axis only at the points

For the curve x^(2)+4xy+8y^(2)=64 , the tangents are parallel to the x-axis only at the points-

For the curve x^(2)+ 4xy + 8y^(2) = 64 the tangents are parallel to the x-axis only at the points

If tangent to the curve y=f(x) at any point is parallel to y -axis,then at that point (dy)/(dx) equals to