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  • Provide solution for RD Sharma maths class 12 chapter Determinants exercise 5.1 question 12 subquestion (i)

Provide solution for RD Sharma maths class 12 chapter Determinants exercise 5.1 question 12 subquestion (i)

Answers (1)

Answer:

x=\frac{13}{15}

Hint:

If matrix is singular, then |A| = 0

Given:

\begin{bmatrix} 1+x &7 \\ 3-x &8 \end{bmatrix}

Solution:

\begin{aligned} &|\mathrm{A}|=0 \\ &8+8 \mathrm{x}-21+7 \mathrm{x}=0 \\ &15 \mathrm{x}-13=0 \\ &15 \mathrm{x}=13 \\ &\mathrm{x}=\frac{13}{15} \end{aligned}

Posted by

Gurleen Kaur

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