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# Chapter 6 Vocab

### Vocab For Math

TermDefinition
Square Root If b^2 = a, then b is a square root of a. The radical sign, V-, represents a nonnegative square root.
Radical Sign The symbol V- which is used to represent a square root
Square Root Equation An equation that contains a square root with a variable in the radicand
Closed A set of numbers is closed under an operation when the operation performed on any two numbers in the set results in a number that is also in the set
nth root When b^n = a for an integer n greater that 1,b is an nth root of a
Exponential Function A function of the form y =ab^x, where a =/ 0, b=/ 1, and b > 0
Exponential Growth When a quantity increases by the same factor over equal intervals of time
Exponential Growth Function A function of the form y = a(1 + r)^t, where a > 0 and r > 0
Compound Interest Interest earned on the principal and on previously earned interest
Exponential Decay When a quantity decreases by the same factor over equal intervals of time
Exponential Decay Function A function of the form y = a(1 - r)^t
Geometric Sequence A sequence in which the ratio between consecutive terms is the same; This ratio is called the common ratio
Common Ratio The ratio between consecutive terms of a geometric sequence
Recursive Rule Gives the beginning term(s) of a sequence and an equation that indicates how any term aVn in the sequence relates to the previous term.
Created by: amirnight