1.

If A = { (x,y) : x^2 + y^2 = 25 } and B = { (x,y) : x^2 + 9y^2 =144 }, then A intersection B contains ___. (MU-OET 2015)a) one pointb) two pointsc) three pointsd) four points

Answer»

25-y^2=144-9y^2

or,8y^2=119

or,y^2=119/8

x^2=25-119/8

=200-119/8

=81/8

four point

for ONE POSITIVE x we get two REAL y


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