Question

help

Answer 1

now what?

Answer 2

work

Answer 3

http://prntscr.com/f336g7

Answer 4

these might be familiar cause i gotta do it again

Answer 5

there is some formula for this, but you can just add the numbers right?

Answer 6

idk..

Answer 7

what do the dots mean

Answer 8

what do you mean idk
you can use wolfram
http://www.wolframalpha.com/input/?i=1%2F2%2B1%2B2%2B4%2B8%2B16%2B32

Answer 9

c?

Answer 10

the dots mean the pattern continues, double every time

Answer 11

b then

Answer 12

ok b

Answer 13

then for the next one there are taking half it looks like

Answer 14

c

Answer 15

oh no one quarter

Answer 16

c

Answer 17

make technology work for you
]http://www.wolframalpha.com/input/?i=sum+0+to+7+(-800)(1%2F4)%5Ek

Answer 18

c????????????

Answer 19

yeah looks like C

Answer 20

http://prntscr.com/f3387c

Answer 21

wolf says
http://www.wolframalpha.com/input/?i=sum+1+to+10++2%5Ek

Answer 22

u ok der?

Answer 23

yeah i had to figure out how to enter the next one
http://www.wolframalpha.com/input/?i=sum+0+to+7+3*4%5Ek

Answer 24

kaboom

Answer 25

how are you supposed to do these?

Answer 26

lol

Answer 27

i am trying to figure out how many terms the last one has

Answer 28

i think 8 terms
http://www.wolframalpha.com/input/?i=sum+k+%3D+0+to+8++216*(-1%2F6)%5Ek

Answer 29

looks like B

Answer 30

there is no 1944

Answer 31

k lets see if ur right

Answer 32

http://www.wolframalpha.com/input/?i=sum+k+%3D+0+to+8++216*(-1%2F6)%5Ek

Answer 33

correct!

Answer 34

whew
how are are you supposed to do it, any idea?

Answer 35

no and i dont wanna know

Answer 36

it must be some programmable calculator exercise
the answers are only approximate anyways

Answer 37

http://prntscr.com/f33ats

Answer 38

first two are right

Answer 39

last one i forget the formula

Answer 40

well im right

Answer 41

http://www.wolframalpha.com/input/?i=sum+k+%3D+0+to+10+12+%2B+2k&rawformassumption=%7B%22F%22,+%22Sum%22,+%22sumfunction%22%7D+-%3E%2212%2B2k%22&rawformassumption=%7B%22F%22,+%22Sum%22,+%22sumlowerlimit%22%7D+-%3E%220%22&rawformassumption=%7B%22F%22,+%22Sum%22,+%22sumupperlimit2%22%7D+-%3E%2210%22&rawformassumption=%7B%22FVarOpt%22%7D+-%3E+%7B%7B%22Sum%22,+%22sumvariable%22%7D%7D

Answer 42

yes, you are always right

Answer 43

chaching

Answer 44

however you did it
maybe just add?

Answer 45

http://prntscr.com/f33bqz

Answer 46

\[12+14+16+18+20+22+24+26+28+30+32\]

Answer 47

idk it is arithmetic
do you know what "partial sum" means?

Answer 48

b?

Answer 49

\[.05(n-1)-.6\] put \(n=1\) you get \[-.6\] for the first term

Answer 50

but they all have that
then put \(n=1\) and add that to the first number get \[-.6-.05-.6\]

Answer 51

ok i gtg in 5 mins les hurry

Answer 52

i don't see the correct answer there

Answer 53

so lets move on
the next one
first partial sum is \(\frac{5}{8}\)
second partial sum is \[\frac{5}{8}+\frac{5}{8}\times 3\]

Answer 54

that second number is \(2.5\) so it has to be A

Answer 55

is the first question right?

Answer 56

no, first question i don't see a correct answer to

Answer 57

ook

Answer 58

ooh i see i was wrong

Answer 59

first partial sum is \(-.6\)
second is \(-.6+.05-.6=-1.15\)

Answer 60

third is \[-1.15+.05-.6\] whatever that is

Answer 61

damn no even that is wrong

Answer 62

wait so what is the answer on what question

Answer 63

ok i gtg screw this