1
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
The number of real roots of the equation,
e4x + e3x – 4e2x + ex + 1 = 0 is :
A
1
B
2
C
3
D
4
2
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
If the matrices A = $$\left[ {\matrix{ 1 & 1 & 2 \cr 1 & 3 & 4 \cr 1 & { - 1} & 3 \cr } } \right]$$,

B = adjA and C = 3A, then $${{\left| {adjB} \right|} \over {\left| C \right|}}$$ is equal to :
A
8
B
2
C
72
D
16
3
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
Negation of the statement :

$$\sqrt 5 $$ is an integer or 5 is an irrational is :
A
$$\sqrt 5 $$ is not an integer and 5 is not irrational.
B
$$\sqrt 5 $$ is irrational or 5 is an integer.
C
$$\sqrt 5 $$ is an integer and 5 is irrational.
D
$$\sqrt 5 $$ is not an integer or 5 is not irrational.
4
JEE Main 2020 (Online) 9th January Morning Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The product $${2^{{1 \over 4}}}{.4^{{1 \over {16}}}}{.8^{{1 \over {48}}}}{.16^{{1 \over {128}}}}$$ ... to $$\infty $$ is equal to :
A
$${2^{{1 \over 4}}}$$
B
$${2^{{1 \over 2}}}$$
C
1
D
2
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