O-LevelMathematicsVectors and transformations4024/12 · May/June 2019 · Q254 Marks
P = (4 0 / -2 3) Q = (1 -2 / 0 -1) Evaluate PQ.
- (a)P = (4 0 / -2 3) Q = (1 -2 / 0 -1) Evaluate PQ.[2]
- (b)(i)M = (3 -1 / 2 k) The determinant of matrix M is -4. Find the value of k.[1]
- (b)(ii)Find M⁻¹.[1]
Mark scheme
Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.
- [2] (a) (4 8 / -2 -7)
- [B1] for two or three correct elements
- [1] (b)(i) -2
- [1] (b)(ii) -1/4(-2 1 / -2 3) oe isw
- [FT] -1/ (their k) (k must be determinant, so -4) and (d -b / -c a)
- [1] or 1/4(2 -1 / 2 -3) oe isw
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