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3 and 4 .Determinants and Matrices
easy
$\left|\begin{array}{cc}x & x+1 \\ x-1 & x\end{array}\right|$ ની કિંમત શોધો.
A
$0$
B
$1$
C
$2$
D
$3$
Solution
We have
$\left|\begin{array}{cc}x & x+1 \\ x-1 & x\end{array}\right|=x(x)-(x+1)(x-1)=x^{2}-\left(x^{2}-1\right)=x^{2}-x^{2}+1=1$
Standard 12
Mathematics