Question

If $\left(\begin{array}{cc}{\lambda }^3+2\lambda & \lambda +1\\ {\lambda }^2+1& 2+\lambda \end{array}\right|=c{\lambda }^4+d{\lambda }^3+e{\lambda }^2+g\lambda +f$, the value of ‘f ’ is
यदि $\left(\begin{array}{cc}{\lambda }^3+2\lambda & \lambda +1\\ {\lambda }^2+1& 2+\lambda \end{array}\right|=c{\lambda }^4+d{\lambda }^3+e{\lambda }^2+g\lambda +f$ है, तब ‘f’ का मान है

• A. –1
• B. –3
• C. 1
• D. 3

Answer 1

The correct option is A –1

Solution