anonymous
  • anonymous
what is s10 for 1+4+16+64+......?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
hai ganeshie
ganeshie8
  • ganeshie8
hey!
anonymous
  • anonymous
help? :P can i also have steps so i know wit I'm doing?

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More answers

ganeshie8
  • ganeshie8
lets see, do you notice any pattern in the given series ?
anonymous
  • anonymous
ya multiply 4
ganeshie8
  • ganeshie8
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
anonymous
  • anonymous
._.
anonymous
  • anonymous
so is there a formula or something? cause this is way too long
ganeshie8
  • ganeshie8
Need more than two dots and a hyphen to continue assist you .-.
anonymous
  • anonymous
._. thats all i got
anonymous
  • anonymous
BRUH U DASHED OFF WHEN U COULDNT HELP ME?!!
anonymous
  • anonymous
help :(
butterflydreamer
  • butterflydreamer
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
anonymous
  • anonymous
Geometric progress question...
butterflydreamer
  • butterflydreamer
oops i typed it wrong. Give me a minute
butterflydreamer
  • butterflydreamer
*\[S_n = \frac{ a(1-r^n) }{ 1-r }\]
butterflydreamer
  • butterflydreamer
that is the sum formula LOL
anonymous
  • anonymous
\[a_n=a_1(r ^{n-1})\]
anonymous
  • anonymous
so if i use this i get \[S10=\frac{ 1(1-4^2) }{ 1-4 }\]
anonymous
  • anonymous
5 and it doesnt make sense?
anonymous
  • anonymous
?
butterflydreamer
  • butterflydreamer
how did you get the 4^2 part?
anonymous
  • anonymous
he put it inside the parentheses instead of outside
anonymous
  • anonymous
4^10
anonymous
  • anonymous
SRRY
anonymous
  • anonymous
caps
butterflydreamer
  • butterflydreamer
yes it should be 4^10 :) Nowwww, simplify
anonymous
  • anonymous
349525?
butterflydreamer
  • butterflydreamer
excellent :)!
anonymous
  • anonymous
yea...i initial thought it was asking for the 10th term lool
anonymous
  • anonymous
YAY! THNX :3
anonymous
  • anonymous
until i saw its S not a
butterflydreamer
  • butterflydreamer
no worriesss ^_^!

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