1
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

If the coefficient of $x^2$ and $x^3$ in the expansion of $\left(1+8 x+b x^2\right)(1-3 x)^9$ in the power of $x$ are equal, then $b$ is

A
$\frac{54}{7}$
B
$\frac{27}{7}$
C
$\frac{108}{7}$
D
1
2
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

If the unit vectors $\mathbf{a}$ and $\mathbf{b}$ are inclined at $2 \theta$ and $|\mathbf{a}-\mathbf{b}|<1$, then if $0<\theta<\pi, \theta$ lies in the interval.

A
$\left(\frac{5 \pi}{6}, \pi\right]$
B
$\left[0, \frac{\pi}{6}\right]$
C
$\left[\frac{\pi}{6}, \frac{\pi}{2}\right]$
D
$\left(\frac{\pi}{2}, \frac{5 \pi}{6}\right]$
3
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

If the coefficients of $x^7$ and $x^8$ in the expansion of $\left[2+\frac{x}{3}\right]^n$ are equal, then value of $n$ is

A
15
B
45
C
55
D
56
4
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

In a triangle $A B C$ as shown in the diagram, where $A B=5, A C=10$ and $B D=1$, then perimeter of $\triangle A B C$ is

VITEEE 2024 Mathematics - Properties of Triangles Question 1 English

A
9
B
18
C
20
D
30
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