1
AP EAPCET 2025 - 21st May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The set of real values of $x$ such that $f(x)=\sqrt{\frac{[x]-1}{\left.[x]^2-[x]-6\right]}}$ is a real valued function is

A

$[1, \infty)$

B

$(-\infty,-2) \cup[4, \infty)$

C

$[-1,3)$

D

$[-1,2) \cup[4, \infty)$

2
AP EAPCET 2025 - 21st May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If a function $f: Z \rightarrow Z$ is defined by $f(x)=x-(-1)^x$, then $f(x)$ is

A

one-one, but not onto

B

onto but not one-one

C

both one-one and onto

D

neither one-one nor onto

3
AP EAPCET 2025 - 21st May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $2 \cdot 5+5 \cdot 9+8 \cdot 13+11 \cdot 17+\ldots$ to $n$ terms $=a n^3+b n^2+c n+d$, then $a-b+c-d=$

A

7

B

5

C

-3

D

-1

4
AP EAPCET 2025 - 21st May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $A=\left[\begin{array}{ccc}1 & 2 & -2 \\ 2 & -1 & 2 \\ -1 & 1 & -2\end{array}\right]$, then $A+2 A^{-1}=$

A

$\left[\begin{array}{ccc}1 & 4 & 0 \\ 4 & -5 & -4 \\ 0 & -2 & -7\end{array}\right]$

B

$\left[\begin{array}{ccc}0 & 2 & 2 \\ 2 & -4 & -6 \\ 2 & -3 & -5\end{array}\right]$

C

$\left[\begin{array}{ccc}0 & 2 & 1 \\ 2 & -4 & -3 \\ 2 & -6 & -5\end{array}\right]$

D

$\left[\begin{array}{ccc}1 & 4 & -1 \\ 4 & -5 & -1 \\ 1 & -5 & -7\end{array}\right]$