1
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

The number of terms in the expansion of $${(1 + 5\sqrt {2x} )^9} + {(1 - 5\sqrt {2x} )^9}$$ is

A
5
B
7
C
9
D
10
2
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

The number of different seven-digit numbers that can be written using only the three digits 1, 2 and 3 with the condition that the digit 2 occurs twice in each number is

A
7C225
B
7p225
C
7C252
D
None of these
3
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

Given 2x $$-$$ y + 2z = 2, x $$-$$ 2y - z = $$-$$4, x + y + $$\lambda$$z = 4, then the value of $$\lambda$$ such that the given system of equation has no solution is

A
$$-$$3
B
1
C
0
D
3
4
BITSAT 2022
MCQ (Single Correct Answer)
+3
-1

Let $$A = \left[ {\matrix{ 1 & { - 1} & 1 \cr 2 & 1 & { - 3} \cr 1 & 1 & 1 \cr } } \right]$$ and $$10B = \left[ {\matrix{ 4 & 2 & 2 \cr { - 5} & 0 & \alpha \cr 1 & { - 2} & 3 \cr } } \right]$$

If B is the inverse of A, then the value of $$\alpha$$ is

A
4
B
$$-$$4
C
3
D
5
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