1
KCET 2026
MCQ (Single Correct Answer)
+1
-0
Integrating factor of the differential equation $(1 + x^2)\dfrac{dy}{dx} + xy = 1$ is
A
$1 + x^2$
B
$\dfrac{1}{2}\log(1 + x^2)$
C
$\dfrac{x}{1 + x^2}$
D
$\sqrt{1 + x^2}$
2
KCET 2026
MCQ (Single Correct Answer)
+1
-0
The value of $\lambda$ for which the vectors $\vec{a} = 2\hat{i} + \lambda\hat{j} + \hat{k}$ and $\vec{b} = \hat{i} + 2\hat{j} + 3\hat{k}$ are orthogonal is
A
$\dfrac{5}{2}$
B
$\dfrac{-5}{2}$
C
$\dfrac{2}{5}$
D
$\dfrac{-2}{5}$
3
KCET 2026
MCQ (Single Correct Answer)
+1
-0
If $\vec{a} = \hat{i} + \hat{j} + \hat{k}, \vec{b} = \hat{j} - \hat{k}$ and $\vec{a} \times \vec{c} = \vec{b}, \vec{a} \cdot \vec{c} = 3$, then $\vec{c}$ is
A
$\dfrac{5}{3}\hat{i} - \dfrac{2}{3}\hat{j} + \dfrac{2}{3}\hat{k}$
B
$\dfrac{5}{3}\hat{i} + \dfrac{2}{3}\hat{j} - \dfrac{2}{3}\hat{k}$
C
$\dfrac{5}{3}\hat{i} + \dfrac{2}{3}\hat{j} + \dfrac{2}{3}\hat{k}$
D
$-\dfrac{5}{3}\hat{i} + \dfrac{2}{3}\hat{j} + \dfrac{2}{3}\hat{k}$
4
KCET 2026
MCQ (Single Correct Answer)
+1
-0
If $\vec{a} = 2\hat{i} + 2\hat{j} - \hat{k}, \vec{b} = \alpha\hat{i} + \beta\hat{j} + 2\hat{k}$ and $|\vec{a} + \vec{b}| = |\vec{a} - \vec{b}|$, then $\alpha + \beta$ is equal to
A
$2$
B
$-1$
C
$0$
D
$1$