If `x^2+4y^2=4x y ,\ t h e n\ x : y` is `1:1` b. `1:2` c. `2:1` d. `1:4`

If x^(2)+4y^(2)=4xy,quad then |x:y is 1:1 b.1:2 c.2:1 d.1:4

If x=1/3y a n d y=1/2, t h e n x : y : z is equal to 1:2:6 b. 1:3:6 c. 2:4:6 d. 3:2:1

x y=(x+y)6na n d(dy)/(dx)=y/x t h e nn= 1 b. 2 c. 3 d. 4

x y=(x+y)6na n d(dy)/(dx)=y/x t h e nn= 1 b. 2 c. 3 d. 4

If x+i y=(1+i)(1+2i)(1+3i),\ t h e n\ x^2+y^2 is: (a) . 0 (b) . 1 (c) . 100 (d) . none of these

Comprehension 1 Let x ,\ y ,\ z in R^+&\ D=|xx^3x^4-1y y^3y^4-1z z^3z^4-1| If x!=y!=z\ &\ x ,\ y ,\ z are in A.P. and D=o,\ t h e n\ 2x^2z+x^2z^2 is equal to a. 1 b. 2 c. 3\ d. none of these

If x : y=1:1,\ t h e n\ (3x+4y)/(5x+6y)= (a) 7/(11) (b) (17)/(11) (c) (17)/(23) (d) 4/5

If x : y=1:1,\ t h e n\ (3x+4y)/(5x+6y)= (a) 7/(11) (b) (17)/(11) (c) (17)/(23) (d) 4/5

If x ,y in Ra n d2x^2+6x y+5y^2=1,t h e n |x|lt=sqrt(5) b. |x|geqsqrt(5) c. y^2lt=2 d. y^2lt=4

Ifx^2+y^2=1a n dP=(3x-4x^3)^2+(3y-4y^3)^2,t h e nPi se q u a lto