1
AP EAPCET 2024 - 19th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The system of equations $$ x+2 y+3 z=6, x+3 y+5 z=9 \text {, } $$ $2 x+5 y+a z=12$ has no solution when $a=$
A
5
B
6
C
7
D
8
2
AP EAPCET 2024 - 19th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
If $m, n$ are respectively the least positive and greatest negative integer value of $k$ such that $\left(\frac{1-i}{1+i}\right)^k=-i$, then $m-n=$
A
4
B
0
C
6
D
2
3
AP EAPCET 2024 - 19th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
If a complex number $z$ is such that $\frac{z-2 i}{z-2}$ is purely imaginary number and the locus of $z$ is a closed curve, then the area of the region bounded by that closed curve and lying in the first quadrant is $\frac{z-2 i}{z-2}$
A
$2 \pi$
B
$\frac{\pi}{2}$
C
$\pi$
D
$\frac{\pi}{4}$
4
AP EAPCET 2024 - 19th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
Real part of $\frac{(\cos a+i \sin a)^6}{(\sin b+i \cos b)^8}$ is
A
$\sin (6 a-8 b)$
B
$\cos (6 a-8 b)$
C
$\sin (6 a+8 b)$
D
$\cos (6 a+8 b)$
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