Class 12Mathematics3 and 4 .Determinants and MatricesExpansion of determinants, Solution of equation in the form of determinants and area of triangle and Equation of Line
Medium$\left| {\begin{array}{*{20}{c}}1&1&1\\1&{1 + x}&1\\1&1&{1 + y}\end{array}} \right| = $
- A$1$
- B$0$
- C$x$
- D$xy$
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જો $\left|\begin{array}{cc}x & 2 \\ 18 & x\end{array}\right|=\left|\begin{array}{cc}6 & 2 \\ 18 & 6\end{array}\right|,$ હોય,તો $x$ ની કિંમત શોધો.
Easy
View Solutionજો સમીકરણોની સિસ્ટમ $ (k+1)^3 x + (k+2)^3 y = (k+3)^3 $,$ (k+1) x + (k+2) y = k+3 $,અને $ x + y = 1 $ સુસંગત હોય,તો $ k $ ની કિંમત શોધો.
નિશ્ચાયકનું મૂલ્ય શોધો: $\left|\begin{array}{rrr}3 & -1 & -2 \\ 0 & 0 & -1 \\ 3 & -5 & 0\end{array}\right|$
Easy
View Solutionજો $a, b, c$ એ ત્રિકોણ $ABC$ ની બાજુઓ હોય અને $2(\cos A + \cos B + \cos C) = \left|\begin{array}{lll}b & 1 & a \\ a & 1 & c \\ c & 1 & b\end{array}\right| = 0$ હોય,તો આ પદાવલિનું મૂલ્ય શોધો.
$\left| \begin{array}{ccc} 1 & 1 & 1 \\ bc & ca & ab \\ b+c & c+a & a+b \end{array} \right|$ નું મૂલ્ય શું છે?
Medium
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