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2026 NORTHBROOKS P1 Q19
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2026 NORTHBROOKS P1 Q19
Secondary 4
4 marks
Simplify \(\left(\dfrac{16n^4}{m^{12}}\right)^{-3/4}\).
[2]
Solve \(343^x\times3^{3x}=21\).
[2]
Solution:
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Answer:
(a) \(\dfrac{|m|^9}{8|n|^3}\); for positive variables, \(\dfrac{m^9}{8n^3}\). (b) \(\dfrac13\).
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