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

The mean and variance of the data $$4,5,6,6,7,8, x, y$$, where $$x< y$$ are 6 and $$\frac{9}{4}$$, respectively. Then, $$x^2-2 y$$ is equal to

A
8
B
32
C
0
D
4
2
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

Given, a sequence of 4 numbers, first three of which are in GP and the last three are in AP with common difference 6. If first and last term of this sequence are equal, then the last term is

A
4
B
2
C
8
D
16
3
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

If $$a, b, c$$ are non-zero real numbers and if the system of equations $$(a-1) x-y-z=0, -x+(b-1) y-z=0,-x-y+(c-1) z=0$$ has a non-trivial solution, then $$a b+b c+c a$$ equals to

A
$$a b c$$
B
$$a+b+c$$
C
1
D
$$-1$$
4
BITSAT 2023
MCQ (Single Correct Answer)
+3
-1

If $$f(x)=x^2-2 x+1$$ and $$f \circ g(x)=x^2+2 x+1$$, then $$g(x)$$ is equal to

A
$$x-2$$
B
$$x+2$$
C
$$-x-2$$
D
$$-x+2$$
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