If x & y 1 & 6 = 1& 8 1 & 6 then x+2y= - Vidyadip

MCQ

If $ \displaystyle \begin{vmatrix} \text{x} &\text{amp;}\text{ y} \\ 1 &\text{amp; } 6 \end{vmatrix}= \displaystyle \begin{vmatrix} 1&\text{amp; }8 \\ 1 &\text{amp; } 6 \end{vmatrix}$ then $\text{x}+2\text{y}=$

A
9
✓
17
C
10
D
7

✓

Answer

Correct option: B.

17

x = 1.y = 8
$\therefore$ x + 2y = 17

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