1
TS EAMCET 2023 (Online) 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the unique solution of the simultaneous linear equations $3 x-2 y+z=5 k, 2 x+3 y-2 z=-5 k$, $x+4 y+3 z=k$ is $x=\alpha, y=\beta, z=3$, then $k=$

A

1

B

2

C

-1

D

-2

2
TS EAMCET 2023 (Online) 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If the value of $\sqrt{-5-12 i}+\sqrt{7+24 i}$ is a negative real number $k$, then $k=$

A

-5

B

-7

C

-6

D

-4

3
TS EAMCET 2023 (Online) 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Let $z=x+i y$ be a point in the argand plane. If the amplitude of $\left(\frac{z-3}{z+2 i}\right)$ is $\frac{\pi}{2}$, then the locus of $z$ is

A

a circle

B

a straight line

C

a semicircular arc not containing the origin

D

a semicircular arc containing the origin

4
TS EAMCET 2023 (Online) 13th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If a point $P$ denotes the complex number $z=x+i y$ in the argand plane and if $\frac{z-(2+i)}{z+(1-2 i)}$ is purely real, then the locus of $P$ is

A

the line $x+3 y-5=0$ excluding the point $(-1,2)$

B

the circle $x^2+y^2-x-3 y=0$ excluding the point $(-1,2)$

C

the line $x+3 y-5=0$ and the circle $x^2+y^2-x-3 y=0$ excluding the point $(-1,2)$

D

the circle $x^2+y^2-2 x-6 y+5=0$ excluding the point $(-1,2)$

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