आव्यूह $\begin{bmatrix} 2 & -3 & 4 & 0 \\ 5 & -4 & 2 & 1 \\ 1 & -3 & 5 & -4 \end{bmatrix}$ की कोटि (rank) है

  • A
    $0$
  • B
    $3$
  • C
    $2$
  • D
    $1$

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मान लीजिए $f(x) = \left| \begin{array}{ccc} \cos x & x & 1 \\ 2 \sin x & x^3 & 2x \\ \tan x & x & 1 \end{array} \right|$ है। तो $\lim_{x \rightarrow 0} \frac{f(x)}{x^2}$ का मान ज्ञात कीजिए।

यदि $f(x) = \left| \begin{array}{ccc} \cos(x+a+b) & \sin(x+a+b) & 10 \\ \cos(x+b+c) & \sin(x+b+c) & 10 \\ \cos(x+c+a) & \sin(x+c+a) & 10 \end{array} \right|$ है,तो $f(2019)^{f(2020)} - f(2020)^{f(2019)}$ का मान ज्ञात कीजिए।

यदि $f(x) = \left| \begin{array}{ccc} x^3 - x & a + x & b + x \\ x - a & x^2 - x & c + x \\ x - b & x - c & 0 \end{array} \right|$ है,तो:

यदि $y(x) = \left| \begin{array}{ccc} \sin x & \cos x & \sin x + \cos x + 1 \\ 27 & 28 & 27 \\ 1 & 1 & 1 \end{array} \right|$,$x \in R$,तो $\frac{d^2 y}{d x^2} + y$ का मान ज्ञात कीजिए।

यदि $f(x) = \left| \begin{array}{ccc} -\sin x & 2 \sin 2x & 4 \cos^2 x \\ \cos x & 4 \sin^2 x & 2 \sin 2x \\ 0 & -\cos x & \sin x \end{array} \right|$ है,तो $f\left(\frac{5\pi}{4}\right) + f'\left(\frac{5\pi}{4}\right) = $

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