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Card 1 of 21

For a valid exponential base, [...]\text{[...]}[...] for every real xxx.

A

Exponentiation undoes a logarithm of the same base: alog⁡ax=x\boxed{a^{\log_a x}=x}aloga​x=x​, where x>0x>0x>0.

B

The domain of y=ln⁡xy=\ln xy=lnx is x>0x>0x>0, while its range is all real numbers.

C

−3-3−3

D

For a valid exponential base, ax>0\boxed{a^x>0}ax>0​ for every real xxx.

Card 1 of 21

1.9.3 Logarithms as inverse functions Flashcards

  1. A Level
  2. /Maths
  3. /1.9.3 Logarithms as inverse functions

21 flashcards on AQA A Level Maths 1.9.3 Logarithms as inverse functions: the key formulae, methods and definitions you need to recall for Paper 1, Paper 2 and Paper 3.

Flashcards