1
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

$$ \text { Integrating factor of the differential equation } \frac{d y}{d x}+y=\frac{x^3+y}{x} \text { is } $$

A
$$ \frac{x}{e^x} $$
B
$$ e^x $$
C
$$ \frac{e^x}{x} $$
D
$$ x e^x $$
2
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Let $$\mathrm{ABC}$$ be a triangle with equations of its sides $$\mathrm{AB}, \mathrm{BC}$$. $$\mathrm{CA}$$ respectively are $$x-2=0, y-5=0$$ and $$5 x+2 y-10=0$$. Then the orthocentre of triangle lies on the line

A
$$ 3 x+y=1 $$
B
$$ x-2 y=1 $$
C
$$ 4 x+y=13 $$
D
$$ x-y=0 $$
3
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

$$ \text { If } y=\sin ^{-1}(\sqrt{\sin x}) \text {, then } \frac{d y}{d x} \text { equals } $$

A
$$ \frac{1}{2} \sqrt{1-\operatorname{cosec} x} $$
B
$$ \frac{1}{2} \sqrt{1-\sin x} $$
C
$$ \frac{1}{2} \sqrt{1+\operatorname{cosec} x} $$
D
$$ \frac{1}{2} \sqrt{1+\sin x} $$
4
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Let a, b, c be three vector such that $$a \neq 0$$ and $$\vec{a} \times \vec{b}=2 \vec{a} \times \vec{c},|a|=|c|=1,|b|=4$$ and $$|\vec{b} \times \vec{c}|=\sqrt{15}$$. If $$\vec{b}-2 \vec{c}=\lambda \vec{a}$$ then $$\lambda$$ equals to

A
2
B
1
C
$$-1$$
D
$$-4$$
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