1
JEE Main 2020 (Online) 5th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
If x = 1 is a critical point of the function
f(x) = (3x2 + ax – 2 – a)ex , then :
A
x = 1 is a local maxima and x = $$ - {2 \over 3}$$ is a local minima of f.
B
x = 1 and x = $$ - {2 \over 3}$$ are local maxima of f.
C
x = 1 and x = $$ - {2 \over 3}$$ are local minima of f.
D
x = 1 is a local minima and x = $$ - {2 \over 3}$$ is a local maxima of f.
2
JEE Main 2020 (Online) 5th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
There are 3 sections in a question paper and each section contains 5 questions. A candidate has to answer a total of 5 questions, choosing at least one question from each section. Then the number of ways, in which the candidate can choose the questions, is :
A
2250
B
2255
C
3000
D
1500
3
JEE Main 2020 (Online) 5th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Change Language
If
$$\int {{{\cos \theta } \over {5 + 7\sin \theta - 2{{\cos }^2}\theta }}} d\theta $$ = A$${\log _e}\left| {B\left( \theta \right)} \right| + C$$,

where C is a constant of integration, then $${{{B\left( \theta \right)} \over A}}$$
can be :
A
$${{2\sin \theta + 1} \over {5\left( {\sin \theta + 3} \right)}}$$
B
$${{2\sin \theta + 1} \over {\sin \theta + 3}}$$
C
$${{5\left( {2\sin \theta + 1} \right)} \over {\sin \theta + 3}}$$
D
$${{5\left( {\sin \theta + 3} \right)} \over {2\sin \theta + 1}}$$
4
JEE Main 2020 (Online) 5th September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
Change Language
The statement
$$\left( {p \to \left( {q \to p} \right)} \right) \to \left( {p \to \left( {p \vee q} \right)} \right)$$ is :
A
a tautology
B
a contradiction
C
equivalent to (p $$ \vee $$ q) $$ \wedge $$ ($$ \sim $$ p)
D
equivalent to (p $$ \wedge $$ q) $$ \vee $$ ($$ \sim $$ q)
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