Question

4. Evaluate 10∑n=2 25(0.3)^n-1


5. Given the sequence in the table below, determine the sigma notation of the sum for term 4 through term 15.

n a^n
1 5
2 -10
3 20

Answer 1

@madmoiselle_sarcasm
@Agl202 @madmoiselle_sarcasm

Answer 2

Sorry not doing that math yet.

Answer 3

Oh dear my future ahhh

Answer 4

@madmoiselle_sarcasm lol thanks anyways

Answer 5

@math

Answer 6

You're welcome :)

Answer 7

@mickyboy0202 @Mendicant_Bias @TheEdwardsFamily @logan420 @DiamondBear3299

Answer 8

ummm sorry i dont know this im still in pre algebra

Answer 9

aww, thanks anyways lol

Answer 10

id like step by step help , because the lesson doent have an example for these 2

Answer 11

@perl can you help me?

Answer 12

im having trouble reading your question

Answer 13

is it the way i typed it?

Answer 14

Is this the question?
$$
\Large \sum_{n=2}^{10} n $$

Answer 15

yes~ and right next to it is 25(0.3)^n+1

Answer 16

$$

\Large \sum_{n=2}^{10} n= 2 + 3 + 4 + 5+ 6 + 8 + 9 + 10
$$

Answer 17

=47
But the question is this exactly
∑n=210n 25(0.3)^n+1

Answer 18

@perl ?

Answer 19

yes

Answer 20

can you take a screenshot of the assignment, or upload it

Answer 21

ok

Answer 22

thanks

Answer 23

$$
\large \sum_{n=2}^{10}25 (0.3)^{n+1} = 0.96426673425

$$

Answer 24

would you mind telling me how you got that answer?

Answer 25

I used this
http://www.wolframalpha.com/input/?i= \sum_{n%3D2}^{10}25+%280.3%29^{n%2B1}

Answer 26

copy and paste that link

Answer 27

how bout number 5?

Answer 28

anks on number 4 really appreciated :)

Answer 29

and thanks *

Answer 30

@perl are you still there? lol

Answer 31

one moment be right back

Answer 32

ok

Answer 33

we know it has to be from n=4 to n=15

Answer 34

$$
\large \sum_{n=4}^{15}a_n
$$

Answer 35

which of those a_n gives you (1,5) (2,-10) (3,20)

Answer 36

Arent those the first 3 terms that they give me in the box?


i think its a but im not sure

a is 5(-2)^n-1

Answer 37

@perl