OCR C2 2015 June — Question 8

Exam BoardOCR
ModuleC2 (Core Mathematics 2)
Year2015
SessionJune
TopicExponential Equations & Modelling
8
  1. Use logarithms to solve the equation $$2 ^ { n - 3 } = 18000$$ giving your answer correct to 3 significant figures.
  2. Solve the simultaneous equations $$\log _ { 2 } x + \log _ { 2 } y = 8 , \quad \log _ { 2 } \left( \frac { x ^ { 2 } } { y } \right) = 7$$
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