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2 marksInverse of a 2x2 Matrix

CSEC Mathematics · January 2008 · Paper 2 · Question 14(b)(ii)

Given the matrix R = (2 -1, 1 3).

Find R^-1, the inverse of R.

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Other parts of this question

  1. 14(a)Calculate the values of x and y.[5 marks]
  2. 14(b)(i)Show that R is non-singular.[2 marks]
  3. 14(b)(iii)Show that R R^-1 = I.[2 marks]
  4. 14(b)(iv)Using a matrix method, solve the pair of simultaneous equations: 2x - y = 0 and x + 3y = 7.[4 marks]

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