1
KCET 2023
MCQ (Single Correct Answer)
+1
-0

The modulus of the complex number $$\frac{(1+i)^2(1+3 i)}{(2-6 i)(2-2 i)}$$ is

A
$$\frac{2}{\sqrt{2}}$$
B
$$\frac{1}{\sqrt{2}}$$
C
$$\frac{\sqrt{2}}{4}$$
D
$$\frac{4}{\sqrt{2}}$$
2
KCET 2022
MCQ (Single Correct Answer)
+1
-0

If $$3 x+i(4 x-y)=6-i$$ where $$x$$ and $$y$$ are real numbers, then the values of $$x$$ and $$y$$ are respectively,

A
3, 9
B
2, 4
C
2, 9
D
3, 4
3
KCET 2021
MCQ (Single Correct Answer)
+1
-0

If $$\left(\frac{1+i}{1-i}\right)^x=1$$, then

A
$$x=4 n+1, n \in N$$
B
$$x=2 n+1, n \in N$$
C
$$x=2 n, n \in N$$
D
$$x=4 n, n \in N$$
4
KCET 2020
MCQ (Single Correct Answer)
+1
-0

If $$z=x+i y$$, then the equation $$|z+1|=|z-1|$$ represents

A
a circle
B
a parabola
C
$$X$$-axis
D
$$Y$$-axis
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