2025 IGCSE 0580 October/November P21 Q17

2025 IGCSE 0580 October/November P21 Q17

5 marks

\(I=M(k^2+c^2)\)

  1. Find the value of \(I\) when \(M=7,k=3\) and \(c=2\).[2]
  2. Rearrange the formula to write \(k\) in terms of \(I,M\) and \(c\).[3]

Solution:

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Answer:(a) \(91\). (b) \(k=\pm\sqrt{\dfrac IM-c^2}\).

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