Consider an ellipse `x^2/a+y^2/b = 1` If `A_1` and `A_2` denotes area of ellipes are of director circle respectively, them.

If A, A_1,A_2,A_3 are the areas of the inscribed and escribed circles of a DeltaABC, then

Given a > b >0,a_1> b_1>0, area of ellipse (x^2)/(a^2)+(y^2)/(b^2)=1 is twice the area of ellipse (x^2)/(a_1^ 2)+(y^2)/(b_1^ 2)=1 . If eccentricity of the ellipse is same then: (A) a=sqrt(2)a_1 (B) a a_1=bb-1 (C) a b=a_1b_1 (D) none of these

Given a > b >0,a_1> b_1>0, area of ellipse (x^2)/(a^2)+(y^2)/(b^2)=1 is twice the area of ellipse (x^2)/(a_1^ 2)+(y^2)/(b_1^ 2)=1 . If eccentricity of the ellipse is same then: (A) a=sqrt(2)a_1 (B) a a_1=bb-1 (C) a b=a_1b_1 (D) none of these

Given a > b >0,a_1> b_1>0, area of ellipse (x^2)/(a^2)+(y^2)/(b^2)=1 is twice the area of ellipse (x^2)/(a_1^2)+(y^2)/(b_1^2)=1 . If eccentricity of the ellipse is same then: (A) a=sqrt(2)a_1 (B) a a_1=bb-1 (C) a b=a_1b_1 (D) none of these

If the tangent and the normal to x^2-y^2=4 at a point cut off intercepts a_1,a_2 on the x-axis respectively & b_1,b_2 on the y-axis respectively. Then the value of a_1a_2+b_1b_2 is equal to:

If the tangent and the normal to x^2-y^2=4 at a point cut off intercepts a_1,a_2 on the x-axis respectively & b_1,b_2 on the y-axis respectively. Then the value of a_1a_2+b_1b_2 is equal to:

In the picture given above, A_1 "and" A_2 denotes two different types of cells performing body's defence mechanism against the pathogens B_1 "and" B_2 Name the cellular type represented by A_1 "and" A_2 and also mention the respective type of immunity conferred by A_1 "and" A_2