यदि ${a_1}, {a_2}, {a_3}, \dots, {a_n}, \dots$ एक $G.P.$ में हैं,तो सारणिक $\left| \begin{array}{ccc} \log {a_n} & \log {a_{n+1}} & \log {a_{n+2}} \\ \log {a_{n+3}} & \log {a_{n+4}} & \log {a_{n+5}} \\ \log {a_{n+6}} & \log {a_{n+7}} & \log {a_{n+8}} \end{array} \right|$ का मान क्या है?

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

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मान लीजिए $a, b, c$ इस प्रकार हैं कि $b + c \ne 0$। यदि $\left| \begin{array}{ccc} a & a+1 & a-1 \\ -b & b+1 & b-1 \\ c & c-1 & c+1 \end{array} \right| + \left| \begin{array}{ccc} a+1 & b+1 & c-1 \\ a-1 & b-1 & c+1 \\ (-1)^{n+2} \cdot a & (-1)^{n+1} \cdot b & (-1)^n \cdot c \end{array} \right| = 0$ है,तो $n$ किसके बराबर है?

शून्यतर,वास्तविक $a, b$ और $c$ के लिए,यदि $\left| \begin{array}{ccc} \frac{a^2+b^2}{c} & c & c \\ a & \frac{b^2+c^2}{a} & a \\ b & b & \frac{c^2+a^2}{b} \end{array} \right| = \alpha abc$ है,तो $\alpha$ का मान ज्ञात कीजिए।

सारणिक $\left| \begin{array}{ccc} a & a+b & a+2b \\ a+2b & a & a+b \\ a+b & a+2b & a \end{array} \right|$ का मान ज्ञात कीजिए।

यदि ${f_n}(x)$,${g_n}(x)$,${h_n}(x)$ जहाँ $n = 1, 2, 3$,$x$ में बहुपद हैं,इस प्रकार कि ${f_n}(a) = {g_n}(a) = {h_n}(a)$ जहाँ $n = 1, 2, 3$,तो सारणिक $F(x) = \left| \begin{matrix} {f_1}(x) & {f_2}(x) & {f_3}(x) \\ {g_1}(x) & {g_2}(x) & {g_3}(x) \\ {h_1}(x) & {h_2}(x) & {h_3}(x) \end{matrix} \right|$ का मान $x = a$ पर क्या होगा?

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यदि $\theta \in \left(0, \frac{\pi}{2}\right)$ है,तो $\left|\begin{array}{ccc} (\sin \theta+\operatorname{cosec} \theta)^2 & (\sin \theta-\operatorname{cosec} \theta)^2 & 2020 \\ (\cos \theta+\sec \theta)^2 & (\cos \theta-\sec \theta)^2 & 2020 \\ (\tan \theta+\cot \theta)^2 & (\tan \theta-\cot \theta)^2 & 2020 \end{array}\right| = $

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