1
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

The value of $$\lim _\limits{x \rightarrow 0} \frac{8}{x^8}\left(1-\cos \frac{x^2}{2}-\cos \frac{x^2}{4}+\cos \frac{x^2}{2} \cos \frac{x^2}{4}\right)$$ is

A
$$\frac{1}{32}$$
B
$$\frac{1}{8}$$
C
$$\frac{1}{64}$$
D
$$\frac{1}{16}$$
2
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

Let $$\frac{1}{16}, a$$ and $$b$$ be in GP and $$\frac{1}{a}, \frac{1}{b}, 6$$ be in AP, where $$a, b>0$$. Then, $$72(a+b)$$ is equal to

A
12
B
14
C
16
D
18
3
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

The sum of the coefficients of all odd degree terms in the expansion of $$\left(x+\sqrt{x^3-1}\right)^5 +\left(x-\sqrt{x^3-1}\right)^5, x>1$$ is

A
1
B
3
C
2
D
4
4
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

The number of different 6-digit numbers in which only and all the five digits $$1,3,5,7$$ and 9 appear is

A
1200
B
1600
C
2000
D
1800
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