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intervalo 2cos(2x-1)+4

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lim_{x→ ∞}(√x−2x−4 )

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(

3	1	1
1	3	−1
2	4	1

)⁻¹

Inverse matrix

A matrix is invertible if and only if there is a sequence of elementary row (or column) operations taking it to the identity matrix.

Augment with a 3x3 identity matrix

[

3	1	1	∣	1	0	0
1	3	−1	∣	0	1	0
2	4	1	∣	0	0	1

]

Reduce the matrix on the left to the identity matrix

[

1	0	0	∣	716	316	−14
0	1	0	∣	−316	116	14
0	0	1	∣	−18	−58	12

]

The inverse matrix is on the right side of the augmented matrix

716	316	−14
−316	116	14
−18	−58	12

)

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−▭▭	<	7	8	9	÷	`AC`
+▭▭	>	4	5	6	×	☐☐☐
×▭▭	(	1	2	3	−	`x`
▭ \|▭	)	.	0	=	+	`y`

intervalo 2cos(2x-1)+4

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