1
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a $\triangle A B C$, if $\left(r_1-r_3\right)\left(r_1-r_2\right)-2 r_2 r_3=0$, then $a^2-b^2=$

A

$c^2+\frac{b^2}{4}$

B

$c^2$

C

$a b c$

D

$\frac{b+a}{c}$

2
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the median $A D$ of the $\triangle A B C$ is bisected at $E$ and $B E$ meets $A C$ in $E$, then $A F: A C=$

A

$1: 4$

B

$1: 3$

C

$1: 2$

D

$3: 4$

3
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $\mathbf{a}=2 \hat{\mathbf{i}}-3 \hat{\mathbf{j}}+5 \hat{\mathbf{k}}$ and $\mathbf{b}=-\hat{\mathbf{i}}+3 \hat{\mathbf{j}}+3 \hat{\mathbf{k}}$ are two vectors, then the vector of magnitude 28 units in the direction of the vector $\mathbf{a}-\mathbf{b}$ is

A

$3 \hat{i}+6 \hat{j}-2 \hat{k}$

B

$12 \hat{\mathbf{i}}-24 \hat{\mathbf{j}}+8 \hat{\mathbf{k}}$

C

$3 \hat{\mathbf{i}}-6 \hat{\mathbf{j}}-2 \hat{\mathbf{k}}$

D

$12 \hat{i}+24 \hat{j}-8 \hat{k}$

4
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $\bar{a}$ is a unit vector, then

$$ |\mathbf{a} \times \hat{\mathbf{i}}|^2+|\mathbf{a} \times \hat{\mathbf{j}}|^2+|\mathbf{a} \times \hat{\mathbf{k}}|^2= $$

A

4

B

1

C

0

D

2