chapter 3 Flashcards

(57 cards)

1
Q

cords of reflecting over x

A

(x, -y)

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2
Q

cords of reflecting over y

A

(-x,y)

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3
Q

finding log domain

A

(x+THIS NUMBER0 to inf

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4
Q

finding exponential range

A

+ THIS NUMBER to ing

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5
Q

linear or exponent more accurate

A

linear harder to grow at large numbers

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6
Q

repeated multipicaiton on y values

A

exponential

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7
Q

finding elimination

A

figure out how much decreases by

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8
Q

finding asymptote of exp

A

only k value

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9
Q

finding values gien graph

A

think of points on parent graph then check adjustments

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10
Q

writing equation of exponent

A

use asymptote then input x and y to where x=0 to eliminate b

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11
Q

lne=1

A

e^1=e

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12
Q

how log can have negative output

A

b is whole x is fraction

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13
Q

lilypad population doubles each week equation

A

P=22×2t

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14
Q

log func where c<b<a

A

b>0 c fraction a whole

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15
Q

parent ln func

A

y=lnx

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16
Q

-log

A

reflect over x

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17
Q

log-x

A

reflect over y

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18
Q

write equaion of log

A

find shift, do opposite direction, find base

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19
Q

va in log shows

A

left vs right shift frm center

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20
Q

how to see if passes thru point

A

just check

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21
Q

finding inverse

A

switch x and y

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22
Q

population doubling every 12 days

A

p(2)^t/12

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23
Q

y=ab^x

A

a is inital b is growth or decay rate

24
Q

exponential growth vs decay b value

A

decay fraction is b

25
exponent parent function
y=b^x
26
ab^(cx+d)+e
a vertical stretch shrink e up or down, affects range and ha d left or right c horizontal stretch shrink
27
ha vs va
ha only in exp, va only in logg
28
parent function includes
b value of given
29
asymptote exp
x value of range
30
compound interest formula
p(t)=pi(1+r/n)^nt
31
p(t)=pi(1+r/n)^nt variables
pi initial amount r interest rate as decimal n number of times compounded/year t number of years
32
continous exponential growth
y=aie^kt
33
y=aie^kt use ln to solve for
k or t
34
four equations memorized
y=aie^kt y=a(1/2)^t/x p(t)=pi(1+r/n)^nt p(t)=pie^rt
35
log when x is fraction
solv for denom then make negative
36
log when ba nd x are fractions
normal rules act when numerator is 1
37
log when 1/perfect square
root^-2
38
1/x
x^-1
39
solving log
make into exponent equation, make exponets have same bases so you can set the exponents equal to each other
40
vertical
outside a
41
x^ab=
x^ax^b
42
finding exponent equations given two data points
solve for one variable set equal to each other
43
on exponents only
ha
44
base value>
1 growth
45
parent function exponent always gows thru
(0,1)
46
k in exp is
ha
47
number of unknowns
number of points/equations needed
48
can seperate
z^a+b
49
anchor point always
up one from ha unless stretch
50
find ha as shift
shift from anchor to h then solve for a
51
frist point down/up from ha is
anchor and if not one away there is shift
52
write out all exponenet
factors to combine and get new numbers
53
shifts and stretches
can go back and forth
54
another equation
pi(1+/-r)^t
55
log(x-h)+k passes thru
(h+1,k)
56
finding vertical asymptote
just check
57
rate per day
make sure change hours to days