# Chapter 1 - Section 1.4 - Introduction to Identities - 1.4 Problem Set - Page 39: 6

$\frac{1}{4}$

#### Work Step by Step

Let's assume that reciprocal of 4 is '$x$'. By definition, product of a number and its reciprocal is always 1. Therefore- $4 \times x$ = 1 or $x$ = $\frac{1}{4}$ i.e. reciprocal of 4 is $\frac{1}{4}$

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