5 Flashcards

1
Q

exponential func def

A

has the form Ab^x, where A and b are real numbers
A cannot = 0
b >1

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2
Q

-f(x)

A

reflection about the x axis

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3
Q

f(-x)

A

reflection about the y axis

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4
Q

type 1: solving for missing exponent

A

equation can be re-written using the same bases
ex: 25^x = 125
(5^2)^x = 5^3
2x = 3
x = 3/2

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5
Q

exponent same base theorem

A

if b^x = b^y then x=y

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6
Q

property of exponents: m<n

A

iff b^m < b^n (b>1)

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7
Q

property of exponents: m<n (2)

A

iff b^m > b^n (0<b<1)

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8
Q

compound interest formula

A

A(t) = P(1+r/m)^mt
p - principal value
r - interest rate
m - times compounded
t - years

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9
Q

continuous compounding formula

A

A = Pe^rt
P amount invested that pays annual interest compounded continuously for t years

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10
Q

logarithm def

A

for all positive numbers a, that dont = 1
loga^x = the exponent to which the base, a, must be raised to to obtain x
logb^x=y is equal to x = b^y
*an exponent

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11
Q

common logarithm

A

log(x) = log10^x

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12
Q

natural log

A

ln(x) = loge^x

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13
Q

log property: product rule

A

loga^xy = loga^x + loga^y

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14
Q

log property: quotient rule

A

loga^x/y = loga^x - loga^y

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15
Q

log property: power rule

A

loga^x^p = ploga^x

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