beginvmatrix x - 11128611 e n d v m a t r i x -46 Find the value of x -A- x-4B- x-7 C- x -7-2D- x -8

The correct option is D x = 8x amp;1 2 amp;6 nbsp; nbsp; = 46 ⇒ 6 × x 2 × 1 = 46 ⇒ 6x 2 = 46 ⇒ 6x = 2+46 ⇒ 6x = 48 ⇒ x= 48/6 ⇒ x= 8 ...

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Standard X

Mathematics

Determinant

beginvmatrix ...

Question

$∣ ∣ ∣ \begin{matrix} x & 1 2 & 6 \end{matrix} ∣ ∣ ∣ = 46$
Find the value of x?

x = 4

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x = 7

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x = \frac{7}{2}

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x = 8

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Solution

The correct option is D $x = 8$
$∣ ∣ ∣ \begin{matrix} x & 1 2 & 6 \end{matrix} ∣ ∣ ∣ = 46$

$\Rightarrow 6 \times x - 2 \times 1 = 46$
$\Rightarrow 6 x - 2 = 46$
$\Rightarrow 6 x = 2 + 46$
$\Rightarrow 6 x = 48$
$\Rightarrow x = \frac{48}{6}$
$\Rightarrow x = 8$

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∣∣∣x126∣∣∣=46 Find the value of x?

The correct option is D x=8∣∣∣x126∣∣∣=46 ⇒6×x−2×1=46 ⇒6x−2=46 ⇒6x=2+46 ⇒6x=48 ⇒x=486 ⇒x=8

$∣ ∣ ∣ \begin{matrix} x & 1 2 & 6 \end{matrix} ∣ ∣ ∣ = 46$
Find the value of x?

The correct option is D $x = 8$
$∣ ∣ ∣ \begin{matrix} x & 1 2 & 6 \end{matrix} ∣ ∣ ∣ = 46$

$\Rightarrow 6 \times x - 2 \times 1 = 46$
$\Rightarrow 6 x - 2 = 46$
$\Rightarrow 6 x = 2 + 46$
$\Rightarrow 6 x = 48$
$\Rightarrow x = \frac{48}{6}$
$\Rightarrow x = 8$