$\Delta = \left| {\,\begin{array}{*{20}{c}}{a + x}&b&c\\b&{x + c}&a\\c&a&{x + b}\end{array}\,} \right|$ નો અવયવ . . . .થાય.
Medium
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- 1જો $\left| {\,\begin{array}{*{20}{c}}{x + 1}&{x + 2}&{x + 3}\\{x + 2}&{x + 3}&{x + 4}\\{x + a}&{x + b}&{x + c}\end{array}\,} \right| = 0$, તો $a,b,c$ એ . . . શ્રેણીમાં છે.View Solution
- 2જો $A = \left[ {\begin{array}{*{20}{c}}View Solution
{1 + {a^2} + {a^4}}&{1 + ab + {a^2}{b^2}}&{1 + ac + {a^2}{c^2}} \\
{1 + ab + {a^2}{b^2}}&{1 + {b^2} + {b^4}}&{1 + bc + {b^2}{c^2}} \\
{1 + ac + {a^2}{c^2}}&{1 + bc + {b^2}{c^2}}&{1 + {c^2} + {c^4}}
\end{array}} \right]$ અને $det(A) = det(4I)$, કે જ્યાં $I$ એ $3 × 3$ નો એકમ શ્રેણિક હોય તો $(a -b)^3 + (b -c)^3 + (c -a)^3$ મેળવો. - 3જો ${\left\{ {\left( \begin{gathered} 3\,\,1\,\,2 \hfill \\ 8\,\,9\,\,5 \hfill \\ 1\,\,\,1\,\,3 \hfill \\ \end{gathered} \right)\,\left( \begin{gathered} 1\,\,3\,\,3 \hfill \\ 3\,\,2\,\,7 \hfill \\ 3\,\,7\,\,9 \hfill \\ \end{gathered} \right)\left( \begin{gathered} 3\,\,8\,\,1 \hfill \\ 1\,\,\,9\,\,1 \hfill \\ 2\,\,5\,\,3 \hfill \\ \end{gathered} \right)} \right\}^2}\, = \,\left( \begin{gathered} a_1\,\,a_2\,\,a_3 \hfill \\ b_1\,\,b_2\,\,b_3 \hfill \\ c_1\,\,c_2\,\,c_3 \hfill \\ \end{gathered} \right)$View Solution
હોય તો $|a_2 - b_1| + |a_3 - c_1| + |b_3 - c_2|$ ની કિમત મેળવો. - 4જો ${\Delta _1} = \left| {\begin{array}{*{20}{c}}View Solution
{{b^5}{c^6}\left( {{c^3} - {b^3}} \right)}&{{a^4}{c^6}\left( {{a^3} - {c^3}} \right)}&{{a^4}{b^5}\left( {{b^3} - {a^3}} \right)} \\
{{b^2}{c^3}\left( {{b^6} - {c^6}} \right)}&{a{c^3}\left( {{c^6} - {a^6}} \right)}&{a{b^2}\left( {{a^6} - {b^6}} \right)} \\
{{b^2}{c^3}\left( {{c^3} - {b^3}} \right)}&{a{c^3}\left( {{a^3} - {c^3}} \right)}&{a{b^2}\left( {{b^3} - {a^3}} \right)}
\end{array}} \right|$ અને ${\Delta _2} = \left| {\begin{array}{*{20}{c}}
a&{{b^2}}&{{c^3}} \\
{{a^4}}&{{b^5}}&{{c^6}} \\
{{a^7}}&{{b^8}}&{{c^9}}
\end{array}} \right|$ તો ${\Delta _1}{\Delta _2}$ મેળવો. - 5જો $\Delta = \left| {\,\begin{array}{*{20}{c}}{{a_1}}&{{b_1}}&{{c_1}}\\{{a_2}}&{{b_2}}&{{c_2}}\\{{a_3}}&{{b_3}}&{{c_3}}\end{array}\,} \right|$ અને ${A_1},{B_1},{C_1}$ એ ઘટકો ${a_1},{b_1},{c_1}$ ના સહઅવયવ દર્શાવે છે તો નિશ્રાયક $\left| {\begin{array}{*{20}{c}}{{A_1}}&{{B_1}}&{{C_1}}\\{{A_2}}&{{B_2}}&{{C_2}}\\{{A_3}}&{{B_3}}&{{C_3}}\end{array}} \right|$ નું મૂલ્ય મેળવો.View Solution
- 6જો ${a^2} + {b^2} + {c^2} + ab + bc + ca \leq 0\,\forall a,\,b,\,c\, \in \,R$ , હોય તો $\left| {\begin{array}{*{20}{c}}View Solution
{{{(a + b + c)}^2}}&{{a^2} + {b^2}}&1 \\
1&{{{(b + c + 2)}^2}}&{{b^2} + {c^2}} \\
{{c^2} + {a^2}}&1&{{{(c + a + 2)}^2}}
\end{array}} \right|$ ની કિમત મેળવો. - 7ધારોકે $A =\left(\begin{array}{cc} m & n \\ p & q \end{array}\right), d =| A | \neq 0$ અને $| A - d (\operatorname{Adj} A )|=0$ છે. તોView Solution
- 8જો $A = \left[ {\begin{array}{*{20}{c}}{ab}&{{b^2}}\\{ - {a^2}}&{ - ab}\end{array}} \right]$ અને ${A^n} = O$, તો $ n$ ની ન્યૂનતમ કિમત મેળવો.View Solution
- 9શ્રેણિક $\left[ {\begin{array}{*{20}{c}}0&{ - 4}&1\\4&0&{ - 5}\\{ - 1}&5&0\end{array}} \right]$ એ $. ..... .. $ થાય.View Solution
- 10સુરેખ સમીકરણ સંહતિ $3 x-2 y-k z=10$ ; $2 x-4 y-2 z=6$ ; $x+2 y-z=5\, m$ સુસંગત ન હોય તોView Solution