O-LevelMathematicsAlgebra and graphs4024/11 · May/June 2017 · Q246 Marks
Solve 6/(x+1) = 5/(x-3) .
- (a)Solve 6/(x+1) = 5/(x-3) .[2]
- (b)(i)Given f(x) = x - 3 and g(x) = x² + 1. Find f(-5) .[1]
- (b)(ii)Given f(x) = x - 3 and g(x) = x² + 1. Find m given that g(m - 3) = 17.[3]
Mark scheme
Marking points from the official mark scheme (May/June 2017). The mark or mark type is shown in brackets.
- [2] 23 M1 for 6x-18 or 5x + 5
- [1] -8
- [3] -1 or 7 with correct working M1 (m-3)² correctly expanded to m² – 6m +9 or (m - 3)² + 1 = 17 and M1 for m² – 6 m − 7 = 0 or ( m-3)=±4 or SC1 for m = −1 or 7 with no working
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