WJEC Unit 1 Specimen — Question 12

Exam BoardWJEC
ModuleUnit 1 (Unit 1)
SessionSpecimen
TopicLaws of Logarithms

12. Prove that $$\log _ { 7 } a \times \log _ { a } 19 = \log _ { 7 } 19$$ whatever the value of the positive constant \(a\).