यदि $\left| {\,\begin{array}{*{20}{c}}{1 + ax}&{1 + bx}&{1 + cx}\\{1 + {a_1}x}&{1 + {b_1}x}&{1 + {c_1}x}\\{1 + {a_2}x}&{1 + {b_2}x}&{1 + {c_2}x}\end{array}\,} \right|$ $ = {A_0} + {A_1}x + {A_2}{x^2} + {A_3}{x^3}$ , तब ${A_1}$ का मान होगा

यदि ${\left| {\,\begin{array}{*{20}{c}}4&1\\2&1\end{array}\,} \right|^2} = \left| {\,\begin{array}{*{20}{c}}3&2\\1&x\end{array}\,} \right| - \left| {\,\begin{array}{*{20}{c}}x&3\\{ - 2}&1\end{array}\,} \right|$,तो  $x $ का मान होगा

निम्नलिखित में दिए गए शीर्ष बिंदुओं वाले त्रिभुजों का क्षेत्रफल ज्ञात कीजिए।: $(1,0),(6,0),(4,3)$

यदि $2x + 3y - 5z = 7, \,x + y + z = 6$, $3x - 4y + 2z = 1,$ तो  $x =$

यदि $\Delta  = \left| {\,\begin{array}{*{20}{c}}a&{a + b}&{a + b + c}\\{3a}&{4a + 3b}&{5a + 4b + 3c}\\{6a}&{9a + 6b}&{11a + 9b + 6c}\end{array}\,} \right|$ जहाँ $a = i,b = \omega ,c = {\omega ^2}$, तब $\Delta $का मान होगा

यदि $A = \left| {\,\begin{array}{*{20}{c}}{\sin (\theta + \alpha )}&{\cos (\theta + \alpha )}&1\\{\sin (\theta + \beta )}&{\cos (\theta + \beta )}&1\\{\sin (\theta + \gamma )}&{\cos (\theta + \gamma )}&1\end{array}\,} \right|$ ,तब