1
WB JEE 2025
MCQ (Single Correct Answer)
+1
-0.25
Change Language

$\int_\limits{-1}^1 \frac{x^3+|x|+1}{x^2+2|x|+1} d x$ is equal to

A
$\log 2$
B
$2 \log 2$
C
$\frac{1}{2} \log 2$
D
$4 \log 2$
2
WB JEE 2025
MCQ (Single Correct Answer)
+1
-0.25
Change Language

If $\vec{a}, \vec{b}, \vec{c}$ are non-coplanar vectors and $\lambda$ is a real number then the vectors $\vec{a}+2 \vec{b}+3 \vec{c}, \lambda \vec{b}+4 \vec{c}$ and $(2 \lambda-1) \vec{c}$ are non-coplanar for

A
no value of $\lambda$.
B
all except one value of $\lambda$.
C
all except two values of $\lambda$.
D
all values of $\lambda$.
3
WB JEE 2025
MCQ (Single Correct Answer)
+1
-0.25
Change Language

Let $\omega(\neq 1)$ be a cubic root of unity. Then the minimum value of the set $\left\{\mid a+b \omega+c \omega^2\right\}^2 ; a, b, c$ are distinct non-zero integers} equals

A
15
B
5
C
3
D
4
4
WB JEE 2025
MCQ (Single Correct Answer)
+1
-0.25
Change Language

$\int\limits_0^{1 \cdot 5}\left[x^2\right] d x$ is equal to

A
$2$
B
$2-\sqrt{2}$
C
$2+\sqrt{2}$
D
$\sqrt{2}$
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