1
JEE Main 2022 (Online) 29th June Morning Shift
+4
-1

If the constant term in the expansion of

$${\left( {3{x^3} - 2{x^2} + {5 \over {{x^5}}}} \right)^{10}}$$ is 2k.l, where l is an odd integer, then the value of k is equal to:

A
6
B
7
C
8
D
9
2
JEE Main 2022 (Online) 28th June Evening Shift
+4
-1

The term independent of x in the expansion of

$$(1 - {x^2} + 3{x^3}){\left( {{5 \over 2}{x^3} - {1 \over {5{x^2}}}} \right)^{11}},\,x \ne 0$$ is :

A
$${7 \over {40}}$$
B
$${33 \over {200}}$$
C
$${39 \over {200}}$$
D
$${11 \over {50}}$$
3
JEE Main 2022 (Online) 28th June Morning Shift
+4
-1
Out of Syllabus

If

$$\sum\limits_{k = 1}^{31} {\left( {{}^{31}{C_k}} \right)\left( {{}^{31}{C_{k - 1}}} \right) - \sum\limits_{k = 1}^{30} {\left( {{}^{30}{C_k}} \right)\left( {{}^{30}{C_{k - 1}}} \right) = {{\alpha (60!)} \over {(30!)(31!)}}} }$$,

where $$\alpha$$ $$\in$$ R, then the value of 16$$\alpha$$ is equal to

A
1411
B
1320
C
1615
D
1855
4
JEE Main 2022 (Online) 26th June Morning Shift
+4
-1

The remainder when (2021)2023 is divided by 7 is :

A
1
B
2
C
5
D
6
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