Question

find the sum to the required number of terms for the geometric series

243+81+27+... to 7 terms
i know the formula is s=b1*(1-q^n)/(1-q)
but every time i plug it in i get 1093/3
can someone else tell me how to plug it inn please

Answer 1

b1=243

Answer 2

q=1/3

Answer 3

so find it

Answer 4

n=7

Answer 5

\[243 \times \dfrac{1 - \dfrac{1}{3^7}}{1 - \dfrac{1}{3}}\]

Answer 6

ParthKohli just gave you the explicit answer, where did you mistake

Answer 7

ok i did that and i still got 1093/3

Answer 8

That's weird.

Answer 9

You can just calculate \(243 + 81 + 27 + 9 + 3 + 1 + \dfrac{1}{3}\)

Answer 10

that's correct by the way) xDD

Answer 11

what did you get when u simplified the equation

Answer 12

lol

Answer 13

yeah, that is correct.

Answer 14

1093/3 is correct?

Answer 15

yes, that's correct) xD

Answer 16

oh ok thank youu