There's a mistake in the mark scheme. All < or > should be <= or >=.URGENT HELP.QUESTION 3a) i)Question paper: http://papers.xtremepapers.com/CIE/Cambridge IGCSE/Mathematics (0580)/0580_s12_qp_42.pdfWhy isn't it x≥4 ?? the answer is x>4
The correct answers are in the examiners report.