Consider this matrix:⎣⎡−4−10amp;0amp;amp;−6⎦⎤Find the inverse of the matrix. Give exact values. Non-integers can be given as decimals or as simplified fractions.
Q. Consider this matrix:⎣⎡−4−100−6⎦⎤Find the inverse of the matrix. Give exact values. Non-integers can be given as decimals or as simplified fractions.
Calculate determinant: To find the inverse of a 2×2 matrix given by [aamp;bcamp;d], we use the formula for the inverse of a 2×2 matrix: ad−bc1×[damp;−b−camp;a]. First, we need to calculate the determinant ad−bc.
Determinant calculation: The determinant of our matrix [[−4,0],[−10,−6]] is calculated as (−4)⋅(−6)−(0)⋅(−10).
Find inverse matrix: The determinant is (−4)⋅(−6)−(0)⋅(−10)=24−0=24.
Multiply by reciprocal: Now that we have the determinant, we can find the inverse by multiplying the reciprocal of the determinant by the matrix [[d,−b],[−c,a]]. For our matrix, a=−4, b=0, c=−10, and d=−6. So the matrix [[d,−b],[−c,a]] becomes [[−6,0],[10,−4]].
Calculate inverse matrix: Multiplying the reciprocal of the determinant, which is 241, by the matrix [−6amp;010amp;−4] gives us the inverse matrix. We perform the multiplication for each element of the matrix.
Simplify fractions: The inverse matrix is 241×[−6amp;010amp;−4] which simplifies to [24−6amp;2402410amp;24−4].
Final inverse matrix: Simplify the fractions in the matrix to get [−41amp;0125amp;−61]. This is the inverse of the original matrix.
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