Chapter 21 • Class 9 Mathematics
Logarithms
Study by topic — one focused page each
1
Converting Between Exponential and Logarithmic Form
What is a Logarithm? A logarithm answers the question: "To what power must a base be raised to get a given number?" If \(a^x = y\) (exponential form),…
Start this topic → 2Laws of Logarithms
What are the Laws of Logarithms? The laws of logarithms are rules that help us simplify, expand, or contract logarithmic expressions. They follow dire…
Start this topic → 3Common Logarithms and Applications
What are Common Logarithms? Common logarithms are logarithms with base 10. They are written as \(\log x\) (without writing the base 10). Why Base 10? …
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