Tim Gan Math
Sign up free

Direct cube-root relationship

Direct cube-root relationship

Secondary 2
6 marks
TGM Original Questions

Optional extension

It is given that \(y\) is directly proportional to \(\sqrt[3]{x}\), and \(y=2\) when \(x=8\).

  1. Express \(y\) in terms of \(x\).[2]
  2. Hence find
    1. \(y\) when \(x=-125\), and[2]
    2. \(x\) when \(y=4\).[2]

Solution:

Solution locked

680+ questions here come with free worked solutions. A free account saves your questions and progress; this one needs a course plan.

Create free accountSign inGet the E Math course · from S$29.98/moE Math tuition

Create a free account to practise similar questions.

Create free accountSign inGet the E Math course · from S$29.98/moE Math tuition
Answer:(a) \(y=\sqrt[3]{x}\) (b)(i) \(y=-5\) (ii) \(x=64\).

Need help? Join our E-Maths tuition for O-Level success.

Learn more