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Edexcel IGCSE Math A Higher 1.4.HC numerical index laws

Edexcel IGCSE Math A Higher 1.4.HC numerical index laws
Edexcel IGCSE Math A syllabusMath A 4MA1First assessment 2018

Practise higher index-law questions by equating bases, solving for unknown exponents and using fractional or negative powers.

How this is tested

  • Combine powers with the same base to find n in numerical index expressions.
  • Rewrite numbers as common prime bases before equating indices to solve an unknown.
  • Apply fractional and negative powers to evaluate n from equations such as n^(-4/5).

Question 7

73−2×35310=3n7 \quad \frac{3^{-2} \times 3^{5}}{3^{10}}=3^{n}
Find the value of n

n=