1
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

Find the solution of $$\frac{d y}{d x}=\frac{1}{\cos (x-y)}$$

A
$$-\cot \left(\frac{x+y}{2}\right)+c$$
B
$$\operatorname{cosec}^2\left(\frac{x+y}{2}\right)+c$$
C
$$\tan \left(\frac{x+y}{2}\right)+c$$
D
$$\cot \left(\frac{x-y}{2}\right)+c$$
2
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

An urn contains 5 red marbles, 4 black marbles and 3 white marbles. Then the number of ways in which 4 marbles can be drawn so that at the most three of them are red is

A
590
B
490
C
430
D
510
3
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

The value of $$\lim _\limits{x \rightarrow \infty}\left[\frac{p^{1 / x}+q^{1 / x}+r^{1 / x}+s^{1 / x}}{4}\right]^{3 x}, p, q, r, s>0 \text {, }$$ is

A
$$(\text {pqrs})^3$$
B
$$(p q r s)^{3 / 2}$$
C
$$(\text {pqrs})^{3 / 4}$$
D
None of these
4
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

If $$f(x)=\left\{\begin{array}{cc}(\sin x+\cos x)^{\operatorname{cosec} x} & ,-\frac{\pi}{2}< x<0 \\ a & ,x=0 \\ \frac{e^{1 / x}+e^{2 / x}+e^{3 / x}}{a e^{-2+\frac{1}{x}}+b e^{-1+\frac{3}{x}}} & , 0< x<\frac{\pi}{2}\end{array}\right.$$ is continuous at $$x=0$$, then the value of $$(b, a)$$ is

A
$$(-1, e)$$
B
$$(1,-e)$$
C
$$(1, e)$$
D
$$(e, 1)$$
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