A-LevelMathematicsAlgebra9709/21 · Oct/Nov 2024 · Q24 Marks
Solve the inequality |x-7|>4x+3.
- Solve the inequality |x-7|>4x+3.[4]
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2024). The mark or mark type is shown in brackets.
- [M1] Attempt solution of equation or inequality, where signs of x and 4x are different
- [A1] Obtain x = 4/5 and x = -10/3
- [A1] Consider condition 4x+3 < 0 or test values for the regions defined by critical points
- [A1] Conclude x < 4/5
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