1.

If S and S' are the foci of the ellipse (x^(2))/( 25)+ ( y^(2))/( 16) =1, and P is any point on it then range of values of SP.S'P is

Answer»

` 9 le F (theta) le 16`
` 9 le f (theta ) le 25`
` 16 le f (theta)le 25`
` 1 le f(theta) le 16`

Answer :C


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