Question

help

Answer 1

Okay?

Answer 2

@Vocaloid

Answer 3

give me a sec

Answer 4

https://s1.postimg.org/1sdjjfr30f/Capture.png

Answer 5

@Vocaloid

Answer 6

@Vocaloid

Answer 7

i know it is an exponential function but not sure why

Answer 8

we can re-write it so it looks like y = ab^x

Answer 9

f(x) = 3^(2x-3) if we apply our exponent rules we can get

f(x) = 3^(2x)/3^3

Answer 10

so b?

Answer 11

hold on let me check something

Answer 12

having a bit of a brain fart, trying to re-write 3^(2x) in terms of 3^x but don't remember how

Answer 13

(other than (3^x)^2)

Answer 14

ok apparently it's base 9 (D) had to use software for this >>

Answer 15

oh ok working on 2 to see if i can figure it out

Answer 16

for x ----> - infinity, what happens to the value of b^x?

Answer 17

it's a or c

Answer 18

hint: b^x goes to 0 for very large negative x

Answer 19

but what about very large positive x?

Answer 20

i didn't get an exonential function i got some shaded crap

Answer 21

you don't have to rely on a graph for this, you can think about it in terms of algebra

what is the value of b^x like if x is something very large like 1000000?

Answer 22

so it is c because when f is infinity x is too

Answer 23

right?

Answer 24

not quite

see how it says "as x ---> 0"? that's not end behavior

Answer 25

end behavior is x---> + infinity or x ---> - infinity

Answer 26

try to think about some of the clues I have given you

Answer 27

the graph has the line at the one because when you do an exponent to the first power it's itself and 0 is 1

Answer 28

again, try not to rely on the graph, you don't always have the option of graphing

Answer 29

so 0 makes sense

Answer 30

we are asking about "end behavior" which is the behavior of the graph when x ---> positive or negative infinity

it does not make any sense to look at the function when x ---> 0 because that's not end behavior

Answer 31

x = 0 is the middle of the graph not the end

Answer 32

here are the clues I have given you:

when x is a very large negative number, the function goes to 0
when x is a very large positive number, the function goes to very large positive numbers

use these clues to find the best answer

Answer 33

https://s1.postimg.org/4mhyup9dn3/Capture.png

Answer 34

what did you get for #2?

Answer 35

a?

Answer 36

0 to -infinity

Answer 37

good! A

Answer 38

i knew it was a or c

Answer 39

4 looks good to me

Answer 40

https://s1.postimg.org/8aeb8dt5wf/Capture.png

Answer 41

3 more questions

Answer 42

hint: can y = ab^x be negative if a and b are positive?

Answer 43

no unless you have it is a negative exponent like to the 3 or something

Answer 44

even with a negative exponent, it's still positive! for example, (2)(3)^(-3) is still positive

Answer 45

so your domain is all reals and your range is all real positives

Answer 46

so what would the answer be?

Answer 47

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Vocaloid
so your domain is all reals and your range is all real positives
\(\color{#0cbb34}{\text{End of Quote}}\)

^ use this information to find the answer

Answer 48

is it a because b is less than 1 but a real number so -infinity ,0

Answer 49

@Vocaloid

Answer 50

hint: how do you express "all positive numbers" in interval notation?

Answer 51

]

Answer 52

try one more time.

"the positive numbers range from ____ to _____"

try filling in the blanks

Answer 53

https://s1.postimg.org/1d7dhoruz3/Capture.png

Answer 54

only have like 10 min left

Answer 55

then i have to go

Answer 56

infinity to inifinity

Answer 57

and the negative is the same for negative but that's not an answer choice

Answer 58

so we are down to c or d then

Answer 59

hint: positive numbers start at 0 (not including 0)

Answer 60

so "all positive numbers" becomes (0,infinity) in interval notation

Answer 61

how can we express "all real numbers" in interval notation?

Answer 62

(-infinity,infinity) ?

Answer 63

so c?

Answer 64

awesome, so c is the ans.. for #2

Answer 65

can you check my other 2 then 1 more

Answer 66

3 is right

Answer 67

for 4, x = 1, f(x) = e

how can we express this as a point (x,y)?

Answer 68

1,e

Answer 69

good, so C not D

Answer 70

last one? I gotta work on my own hw soon ^_^"

Answer 71

https://s1.postimg.org/8vchec6vjz/Capture.png

Answer 72

this is it

Answer 73

i'm virtual school lol don't have hw just a lot of assignments

Answer 74

for #1 you would also include f(x) = (-5)^x

Answer 75

so 1,2,4

Answer 76

only 2 answers though and i graphed the secod one and it didn't turn out one

Answer 77

2 points mean 2 answers

Answer 78

oh that's odd :S

maybe just go with 1 and 4 then

Answer 79

ok lol i tried clicking 3 answers didn't work said only 2 answers

Answer 80

yep it's 1 and 4

Answer 81

thank you bye