1
JEE Main 2023 (Online) 6th April Morning Shift
+4
-1

Let $$A = \{ x \in R:[x + 3] + [x + 4] \le 3\} ,$$

$$B = \left\{ {x \in R:{3^x}{{\left( {\sum\limits_{r = 1}^\infty {{3 \over {{{10}^r}}}} } \right)}^{x - 3}} < {3^{ - 3x}}} \right\},$$ where [t] denotes greatest integer function. Then,

A
$$B \subset C,A \ne B$$
B
$$A \subset B,A \ne B$$
C
$$A = B$$
D
$$A \cap B = \phi$$
2
JEE Main 2023 (Online) 6th April Morning Shift
+4
-1

The sum of all the roots of the equation $$\left|x^{2}-8 x+15\right|-2 x+7=0$$ is :

A
$$11+\sqrt{3}$$
B
$$9+\sqrt{3}$$
C
$$9-\sqrt{3}$$
D
$$11-\sqrt{3}$$
3
JEE Main 2023 (Online) 1st February Evening Shift
+4
-1

The number of integral values of k, for which one root of the equation $$2x^2-8x+k=0$$ lies in the interval (1, 2) and its other root lies in the interval (2, 3), is :

A
2
B
0
C
1
D
3
4
JEE Main 2023 (Online) 1st February Morning Shift
+4
-1

Let $$S = \left\{ {x:x \in \mathbb{R}\,\mathrm{and}\,{{(\sqrt 3 + \sqrt 2 )}^{{x^2} - 4}} + {{(\sqrt 3 - \sqrt 2 )}^{{x^2} - 4}} = 10} \right\}$$. Then $$n(S)$$ is equal to

A
6
B
4
C
0
D
2
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