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• If the fraction of the atoms of a radioactive material left after 120 years… - 01/28/2023
• Methane is a member of the homologous series called… - 01/28/2023
• One of the features of the fission process is that… - 01/28/2023

If… find the value of x

Now for the right answer to the above question:

1. Option A is incorrect.
2. Option B is correct.
3. C is incorrect.
4. D is not the correct answer.

KEY-POINTS…

You may please note these/this:

• Remember, the two vertical straight lines (not brackets) on both sides of any matrix signifies its determinant.
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/ culled from 2019 JAMB-UTME mathematics question 23 /