Question

answer me with right option​

Answer 1

Question: If determinant |a  b  c  , d  e  f  ,  g  h i | = 7, find the given determinant

Answer:

14

Step-by-step explanation:

$\implies \begin{vmatrix}a & b & c\\2d+a & 2e+b & 2f+c\\ g & h & i\end{vmatrix} \\\\\\\implies\begin{vmatrix}a & b & c\\2d& 2e & 2f\\ g & h & i\end{vmatrix} + \begin{vmatrix}a & b & c\\a & b & c\\ g & h & i\end{vmatrix}\\\\\\ \implies2\begin{vmatrix}a & b & c\\d& e & f\\ g & h & i\end{vmatrix} + \begin{vmatrix}a & b & c\\a & b & c\\ g & h & i\end{vmatrix}\\\\\implies 2(7) + 0 \;\;\;\;\;\;\;\;\;\;\;\;\; \sf{In \;2nd\; determinant, 2 \;rows \;are \;same}$

⇒ 14

Answer 2

Answer:

Option d) 14 is the correct answer

Step-by-step explanation:

See the attachment please