Question : If $x$ is the area, $y$ is the circumference and $z$ is the diameter of the circle, then the value of $\frac{x}{yz}$ is:

Option 1: 4 : 1

Option 2: 1 : 4

Option 3: 1 : 2

Option 4: 2 : 1

Question : If $x+y+z=0$, then the value of $\frac{x^2}{yz}+\frac{y^2}{zx}+\frac{z^2}{xy}$ is:

Option 1: 3

Option 2: 1

Option 3: 0

Option 4: 2

Question : If $x+y+z=0$, then what is the value of $\frac{x^2}{(y z)}+\frac{y^2}{(x z)}+\frac{z^2}{(x y)}$?

Option 1: 1

Option 2: 0

Option 3: 2

Option 4: 3

Question : If $x+y+z=0$, then what is the value of $\frac{x^2}{yz}+\frac{y^2}{xz}+\frac{z^2}{xy}$?

Option 1: $0$

Option 2: $\frac{1}{3}$

Option 3: $1$

Option 4: $3$

Question : If $\frac{x^2}{yz}+\frac{y^2}{zx}+\frac{z^2}{xy}=3$, then what is the value of $(x+y+z)^3$?

Option 1: 0

Option 2: 1

Option 3: 2

Option 4: 3

Question : If $\frac{(x+y)}{z}=2$, then what is the value of $[\frac{y}{(y-z)}+\frac{x}{(x-z)}]?$

Option 1: $0$

Option 2: $1$

Option 3: $2$

Option 4: $–1$