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

If matrix $$A=\left[\begin{array}{ccc}0 & 2 b & -2 \\ 3 & 1 & 3 \\ 3 a & 3 & -1\end{array}\right]$$ is given to be symmetric, then the value of $$a b$$ is

A
1
B
0
C
$$-$$1
D
9/4
2
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

If the 4th term in the expansion of $$\left(p x+\frac{1}{x}\right)^n, n \in N$$ is $$\frac{5}{2}$$ and three normals to the parabola $$y^2=x$$ are drawn through a point $$(q, 0)$$, then

A
$$q=p$$
B
$$q>p$$
C
$$q< p$$
D
$$p q=1$$
3
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

The area of the region containing the points $$(x, y)$$ satisfying $$4 \leq x^2+y^2 \leq 2|x|+|y|$$, is

A
8 sq units
B
2 sq units
C
$$4 \pi$$ sq units
D
6 sq units
4
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

If $$\alpha$$ is a non -real fifth root of unity, then the value of $$3^{\left|1+\alpha+\alpha^2+\alpha^{-2}-\alpha^{-1 \mid}\right|}$$, is

A
9
B
1
C
11/3
D
11
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