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  • Provide solution for RD Sharma maths Class 12 Chapter 5 Determinants Exercise VSQ Question 28 maths textbook solution.

Provide solution for RD Sharma maths Class 12 Chapter 5 Determinants Exercise VSQ Question 28 maths textbook solution

Answers (1)

Answer: -4

Hint: Here we use basic concept of determinant and singular matrix

Given: \left|\begin{array}{cc} 5 x & 2 \\ -10 & 1 \end{array}\right| is similar

Solution :

If matrix is singular then it's determinant always zero

So, \left|\begin{array}{cc} 5 x & 2 \\ -10 & 1 \end{array}\right|=0

\begin{aligned} &5 x(1)-[-10(2)]=0 \\ &5 x+20=0 \\ &5 x=-20 \\ &x=\frac{-20}{5} \\ &x=-4 \end{aligned}

 

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