1
WB JEE 2025
MCQ (Single Correct Answer)
+2
-0.5
Change Language

If $f(x)$ and $g(x)$ are two polynomials such that $\phi(x)=f\left(x^3\right)+x g\left(x^3\right)$ is divisible by $x^2+x+1$, then

A
$\phi(x)$ is divisible by $(x-1)$
B
none of $f(x)$ and $g(x)$ is divisible by $(x-1)$
C
$g(x)$ is divisible by $(x-1)$ but $f(x)$ is not divisible by $(x-1)$
D
$f(x)$ io divisible hv $(x-1)$ but $g(x)$ is not divisible by $(x-1)$
2
WB JEE 2025
MCQ (More than One Correct Answer)
+2
-0
Change Language

If the equation $\sin ^4 x-(p+2) \sin ^2 x-(p+3)=0$ has a solution, the $p$ must lie in the interval

A
$[-3,-2]$
B
$(-3,-2)$
C
$(2,3)$
D
$[-5,-3]$
3
WB JEE 2025
MCQ (More than One Correct Answer)
+2
-0
Change Language

If $0 \leq a, b \leq 3$ and the equation $x^2+4+3 \cos (a x+b)=2 x$ has real solutions, then the value of $(a+b)$ is

A
$\frac{\pi}{4}$
B
$\frac{\pi}{2}$
C
$\pi$
D
$2 \pi$
4
WB JEE 2025
MCQ (More than One Correct Answer)
+2
-0
Change Language

Let $f(x)=x^3, x \in[-1,1]$. Then which of the following are correct?

A
' $f$ ' has a minimum at $x=0$.
B
' $f$ ' has the maximum at $x=1$.
C
' $f$ ' is continuous on $[-1,1]$.
D
' $f$ ' is bounded on $[-1,1]$.
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