Consider any P on the ellipse `x^(2)/25+y^(2)/9=1` in the firsty quadrant. Let r and then (r + s) is equal to

If the maximum distance of any point on the ellipse x^(2)+2y^(2)+2xy=1 from its center is r, then r is equal to

If P is any point on the ellipse 9x^(2) + 36y^(2) = 324 whose foci are S and S'. Then, SP + S' P equals

If P is any point on the ellipse 9x^(2) + 36y^(2) = 324 whose foci are S and S'. Then, SP + S' P equals

The tangent to the ellipse (x^(2))/(25)+(y^(2))/(16)=1 at point P lying in the first quadrant meets x - axis at Q and y - axis at R. If the length QR is minimum, then the equation of this tangent is

If P is any point on the ellipse (x^(2))/(25) + (y^(2))/(9) = 1 whose foci are S and S' perimeter of Delta SPS' is

Let P be a variable point on the ellipse (x^(2))/(25)+(y^(2))/(16)=1 with foci at S and S'. Then find the maximum area of the triangle SPS'

Let P be a variable point on the ellipse x^(2)/25 + y^(2)/16 = 1 with foci at S and S'. If A be the area of triangle PSS' then the maximum value of A, is