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Inequality symbols

The symbols used in an inequality: less than $(<)$, greater than $(>)$, less than or equal to (\( \le \)), and greater than or equal to (\( \ge \)).

 

Index

$n$ is the index in \(\sqrt[n]{a}\).

 

Independent variable

The input of a function.

 

Inconsistent system

A system of equations that have no solution. The slopes of the lines are equal.

 

Imaginary unit i

The square root of -1. \(i = \sqrt { – 1} \)

 

Imaginary part

The part of a complex number that is added to the real part. $bi$ in $a + bi$.

 

Imaginary number

When \(b \ne 0\) in a complex number, $a + bi$.
 

i-form

The form used when writing the square root of a negative number using the imaginary unit $i$.
 

Identities

A relationship equating one expression to another.

 
Glossary: I

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