2026 IGCSE Additional Mathematics February/March 0606/22 Q8

2026 IGCSE Additional Mathematics February/March 0606/22 Q8

8 marks

A circle has centre \((-2,0)\) and radius \(5\).

A line has equation \(y=2x+k\), where \(k\) is a constant.

The line does not meet the circle.

Find the set of possible values of \(k\).[8]

Solution:

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Answer:\(k<4-5\sqrt5\) or \(k>4+5\sqrt5\)

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