શ્રેણિક $\begin{bmatrix} 1 & -1 & 1 \\ 1 & 1 & -1 \\ -1 & 1 & 1 \end{bmatrix}$ નો નિશ્ચાયક (rank) કેટલો છે?

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

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નીચેનામાંથી કયા શ્રેણિકનો ક્રમાંક (rank) $3$ છે?

$f(x) = \left| \begin{array}{ccc} x^3 & x^2 & 3x^2 \\ 1 & -6 & 4 \\ p & p^2 & p^3 \end{array} \right|$,જ્યાં $p$ એક અચળાંક છે,તો $\frac{d^3f(x)}{dx^3}$ શું છે?

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જો $f(x) = \left| \begin{array}{ccc} 2 \cos^2 x & \sin 2x & \sin x \\ \sin 2x & 2 \sin^2 x & -\cos x \\ \sin x & -\cos x & 0 \end{array} \right|$ હોય,તો $\int_0^{\frac{\pi}{4}} (2|f(x)| + 5f'(x)) \, dx$ ની કિંમત શોધો.

જો સદિશો $\vec{\alpha}=\hat{i}+a \hat{j}+a^{2} \hat{k}$,$\vec{\beta}=\hat{i}+b \hat{j}+b^{2} \hat{k}$,અને $\vec{\gamma}=\hat{i}+c \hat{j}+c^{2} \hat{k}$ એ ત્રણ અસમતલીય સદિશો હોય અને $\left|\begin{array}{lll}a & a^{2} & 1+a^{3} \\ b & b^{2} & 1+b^{3} \\ c & c^{2} & 1+c^{3}\end{array}\right|=0$ હોય,તો $abc$ ની કિંમત શોધો.

જો $f(x) = \begin{vmatrix} 2 \cos^4 x & 2 \sin^4 x & 3 + \sin^2 2x \\ 3 + 2 \cos^4 x & 2 \sin^4 x & \sin^2 2x \\ 2 \cos^4 x & 3 + 2 \sin^4 x & \sin^2 2x \end{vmatrix}$ હોય,તો $\frac{1}{5} f'(0)$ ની કિંમત શોધો.

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