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

Let $x-y=0$ and $x+y=1$ be two perpendicular diameters of a circle of radius $R$. The circle will pass through the origin if $R$ is equal to

A
$\frac{1}{2}$
B
$\frac{1}{\sqrt{2}}$
C
$\frac{1}{\sqrt{3}}$
D
$\frac{1}{3}$
2
WB JEE 2025
MCQ (Single Correct Answer)
+2
-0.5
Change Language

Let $f(x)=|x-\alpha|+|x-\beta|$, where $\alpha, \beta$ are the roots of the equation $x^2-3 x+2=0$. Then the number of points in $[\alpha,\beta]$ at which $f$ is not differentiable is

A
2
B
0
C
1
D
infinite
3
WB JEE 2025
MCQ (Single Correct Answer)
+2
-0.5
Change Language

The maximum number of common normals of $y^2=4 a x$ and $x^2=4 b y$ is equal to

A
3
B
4
C
5
D
6
4
WB JEE 2025
MCQ (Single Correct Answer)
+2
-0.5
Change Language

The number of common tangents to the circles $x^2+y^2-4 x-6 y-12=0, x^2+y^2+6 x+18 y+26=0$ is

A
2
B
3
C
4
D
5
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