Algebra 1 Common Core Student Edition, Grade 8-9

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Explicit form ula (p. 276) An explicit formula expresses the

nth term of a sequence in terms of n.

Formula explicita (p. 276) Una formula explicita expresa

el n-esimo termino de una progresion en funcion de n.

Example Let an = 2n + 5 for positive

integers n. If n = 7, then

a 7 = 2(7) +5 = 19.

Exponent (p. 10) A number that shows repeated

multiplication.

Exponente (p. 10)

multiplicarse.

Denota el numero de veces que debe

Example 34 = 3 • 3 • 3 • 3

The exponent 4 indicates that 3 is

used as a factor four times.

Exponential decay (p. 462) A situation modeled with a

function of the form y = at/, where a > 0 and 0 < b < 1.

Example y=5(0.1)x

Decremento exponencial (p. 462) Para a > 0 y

0 < b < 1 , la funcion y = at/ representa el decremento

exponencial.

Exponential function (p. 453) A function that repeatedly

multiplies an initial amount by the same positive number. You

can model all exponential functions using y = at/, where a

is a nonzero constant, b > 0 , and b + 1.

Example

Funcion exponencial (p. 453) Funcion que multiplica

repetidas veces una cantidad inicial por el mismo numero

positivo. Todas las funciones exponenciales se pueden

representar mediante y = akZ, donde a es una constante con

valor distinto de cero, b > 0 y b # 1.

y

A

:ponerttial e>cpc>nent

dtseay- 1 qrowrth

y = 0 5* V=2X

—L 0 i X

al

Exponential growth (p. 460) A situation modeled with a Increm ento exponencial (p. 460) Para a > 0 y b > 1, la

function of the form y = atZ, where a > 0 and b > 1. funcion y = at/ representa el incremento exponencial.

Example y= 100(2)*

Extraneous solution (p. 635) A solution of an equation Solucion extrana (p. 635) Una solucion extraha es una

derived from an original equation that is not a solution of the solucion de una ecuacion derivada que no es una solucion

original equation. de la ecuacion original.

Example ^ = 3 -^ _

b = 3{b + 4) - 4 Multiply by (b + 4).

b = 3b+ 12-4

-2b = 8

b = - 4

Replace b with -4 in the original

equation. The denominator is 0, so

-4 is an extraneous solution.

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