Question

what is s10 for 1+4+16+64+......?

Answer 1

hai ganeshie

Answer 2

hey!

Answer 3

help? :P can i also have steps so i know wit I'm doing?

Answer 4

lets see, do you notice any pattern in the given series ?

Answer 5

ya multiply 4

Answer 6

Right, \(S_{10}\) means the sum of first \(10\) terms :
\[S_{10} = 1 + 4 + 4^2 + 4^3+\cdots + 4^8 + 4^9\]

just check if we have exactly \(10\) terms in above sum

Answer 7

._.

Answer 8

so is there a formula or something? cause this is way too long

Answer 9

Need more than two dots and a hyphen to continue assist you .-.

Answer 10

._. thats all i got

Answer 11

BRUH U DASHED OFF WHEN U COULDNT HELP ME?!!

Answer 12

help :(

Answer 13

note: This is a geometric progression :)
So, if you want to find the sum of the first 10 terms, you would use this formula:
\[S_n = \frac{ a(1-r)^n }{ 1-r }\]
n = nth term, r = common ratio, a = first term

Answer 14

Geometric progress question...

Answer 15

oops i typed it wrong. Give me a minute

Answer 16

*\[S_n = \frac{ a(1-r^n) }{ 1-r }\]

Answer 17

that is the sum formula LOL

Answer 18

\[a_n=a_1(r ^{n-1})\]

Answer 19

so if i use this i get \[S10=\frac{ 1(1-4^2) }{ 1-4 }\]

Answer 20

5 and it doesnt make sense?

Answer 21

?

Answer 22

how did you get the 4^2 part?

Answer 23

he put it inside the parentheses instead of outside

Answer 24

4^10

Answer 25

SRRY

Answer 26

caps

Answer 27

yes it should be 4^10 :)
Nowwww, simplify

Answer 28

349525?

Answer 29

excellent :)!

Answer 30

yea...i initial thought it was asking for the 10th term lool

Answer 31

YAY! THNX :3

Answer 32

until i saw its S not a

Answer 33

no worriesss ^_^!