Question

Evaluate the series 4+2+1+1/2+1/4 to S10

Answer 1

use the formula bellow :
Sn = a1(1 - r^n)/(1 - r)

with a1 = the first term
r = ratio
n = number terms (known n = 10)

Answer 2

to get ratio :
r = a2/a1 = 2/4 = 1/2

Answer 3

how do you find the ratio

Answer 4

look at my the 2nd coment ^

Answer 5

yeah did not see that at first

Answer 6

now, distribute all values above into that formula to get your answer

Answer 7

yeah, that can be corrected :)
i got 7.9921875

Answer 8

thanks

Answer 9

you're welcome