Question

Please help!!!
What is the sum of the first eight terms of a geometric series whose first term is 3 and whose common ratio is 1/2?

Answer 1

error... the common ratio is 1/2

Answer 2

Is it 5.9765625=765/128 ???

Answer 3

@ganeshie8 can you check please

Answer 4

@hartnn can you help me please!!! is this correct 5.9765625=765/128

Answer 5

so the common ratio is 1/2 yes?

Answer 6

the term is 3

Answer 7

yes, r =1/2

same formula
\(S_n = a_1\dfrac{r^n-1}{r-1}\)

a1 = 1st term = 3
n= 8

Answer 8

0.5+0.25+0.125

Answer 9

765/128 is correct:)

Answer 10

thank you