1
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

$$ \text { If }{ }^{\mathrm{n}} C_{13},{ }^{\mathrm{n}} C_{14} \text { and }{ }^{\mathrm{n}} C_{15} \text { are in arithmetic progression, then the positive integer value of ' } \mathbf{n} \text { ' can be } $$

A

34

B

14

C

24

D

41

2
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

If $2 \sin \theta=\left(x+\frac{1}{x}\right)$, then $\sin 3 \theta+\frac{1}{2}\left(x^3+\frac{1}{x^3}\right)=$

A

1

B

-1

C

3

D

0

3
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

If the two ends of the major axis of an ellipse are $(5,0)$ and $(-5,0)$ and one focus lies on the line $3 x-5 y-9=0$, then its equation is

A

$\frac{x^2}{16}+\frac{y^2}{25}=1$

B

$\frac{x^2}{25}+\frac{y^2}{34}=1$

C

$\frac{x^2}{25}+\frac{y^2}{16}=1$

D

$\frac{x^2}{25}+\frac{y^2}{9}=1$

4
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The function $\boldsymbol{f}(\boldsymbol{x})=|\boldsymbol{x}|+|\boldsymbol{x}-\mathbf{1}|$ is:

A

Neither differentiable at $x=0$ nor $x=1$

B

Differentiable at $x=0$ but not at $x=1$

C

Differentiable at $x=1$ but not at $x=0$

D

Differentiable at $x=0$ and $x=1$