અમુક $a, b$ માટે,ધારો કે $f(x) = \left|\begin{array}{ccc} a+\frac{\sin x}{x} & 1 & b \\ a & 1+\frac{\sin x}{x} & b \\ a & 1 & b+\frac{\sin x}{x} \end{array}\right|, \quad x \neq 0$. જો $\lim_{x \rightarrow 0} f(x) = \lambda + \mu a + \nu b$ હોય,તો $(\lambda + \mu + \nu)^2$ ની કિંમત શોધો:

  • A
    $25$
  • B
    $9$
  • C
    $36$
  • D
    $16$

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શ્રેણિક $A=\begin{bmatrix} 1 & -1 & 0 & -2 \\ -4 & 4 & 0 & 8 \\ -2 & 1 & 2 & 4 \end{bmatrix}$ નો નિશ્ચાયક (Rank) શોધો.

જો $S_{r} = \left|\begin{array}{ccc} 2r & x & n(n+1) \\ 6r^{2}-1 & y & n^{2}(2n+3) \\ 4r^{3}-2nr & z & n^{3}(n+1) \end{array}\right|$ હોય, તો $\sum_{r=1}^{n} S_{r}$ નું મૂલ્ય કોનાથી સ્વતંત્ર છે?

જો $\left|\begin{array}{ccc}x^2+3x & x+1 & x-3 \\ x-1 & 2-x & x+4 \\ x-3 & x-3 & 3x\end{array}\right|=a_0+a_1x+a_2x^2+a_3x^3+a_4x^4$ હોય, તો $(a_1+a_3)+2(a_0+a_2+a_4)$ 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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