2 marksInverse of a 2x2 Matrix
CSEC Mathematics · January 2012 · Paper 2 · Question 11(c)(i)
The matrix, Q, is such that Q = (4 2; 1 1).
Find Q⁻¹.
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Practise this questionOther parts of this question
- 11(a)(i)a)Write as a column vector, in the form (x, y), OA.[1 mark]
- 11(a)(i)b)Write as a column vector, in the form (x, y), OB.[1 mark]
- 11(a)(i)c)Write as a column vector, in the form (x, y), BA.[2 marks]
- 11(a)(ii)a)Write as a column vector in the form (x, y), BG.[1 mark]
- 11(a)(ii)b)Write as a column vector in the form (x, y), OG.[1 mark]
- 11(b)(i)Evaluate L + 2M.[2 marks]
- 11(b)(ii)Evaluate LM.[2 marks]
- 11(c)(ii)Using a matrix method, find the values of x and y in the equation (4 2; 1 1) (x; y) = (8; 3).[3 marks]
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