CAT Logarithms & Exponents: A Strategic Guide

Fluency with exponents and their inverse, logarithms, is a critical skill for solving a specific but important set of questions on the CAT. This guided path will teach you the fundamental rules and the application strategies needed to manipulate and simplify these complex expressions.

Section 1: Mastering Exponents (Indices)

The Foundation: What is an Exponent?

Start with the core definitions, including positive, negative, zero, and fractional exponents. Build an intuitive understanding with our interactive explorer.

Repeated Multiplication

$$a^n$$ means multiplying 'a' by itself 'n' times.

Core Application: Properties & Laws of Exponents

Master the essential rules for manipulating exponents, such as the product, quotient, and power rules, which are the foundation for understanding logarithms.

Basic Operations

$$ a^m \times a^n $$ = $$ a^{m+n} $$

Verify with numbers:

$$ a^m / a^n $$ = $$ a^{m-n} $$

Verify with numbers:

Section 2: Deconstructing Logarithms

The Foundation: What is a Logarithm? (NEW)

Build an intuitive understanding of what a logarithm represents by visually translating between exponential and logarithmic forms.

Logarithm is the inverse of an Exponent.

Exponential Form
$$ 2^3 = 8 $$
Logarithmic Form
$$ \log_2(8) = 3 $$

Core Skill: Applying Log Properties (NEW)

Learn the three essential log properties (Product, Quotient, and Power rules) and practice applying them to simplify complex expressions.

Step 1The Rule

$$ \log_b(M) + \log_b(N) = \log_b(M \times N) $$

Step 2Example

Simplify: $$ \log_{10}(5) + \log_{10}(20) $$

Step 3Apply Rule

$$ \log_{10}(5 \times 20) = \log_{10}(100) $$

Step 4Solve

$$ 10^x = 100 \implies x = 2 $$
Interactive Practice

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