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Edexcel IGCSE Math A Foundation 1.4.C index notation and laws with powers

Edexcel IGCSE Math A Foundation 1.4.C index notation and laws with powers
Edexcel IGCSE Math A syllabusMath A 4MA1First assessment 2018

Practise index-law questions by combining same-base powers, using zero or negative indices and rewriting expressions as one power.

How this is tested

  • Combine powers with the same base to find an unknown index such as n or k.
  • Use zero and negative powers correctly in expressions such as 5^0 or 8^-2.
  • Rewrite products, quotients and square-root powers as one power of a given base.

Question 25

258−2×89810=8n25 \frac{8^{-2} \times 8^{9}}{8^{10}}=8^{n}
Work out the value of n

n=