Which of the following could be used to calculate the sum of the first eight terms of the sequence whose first three terms are 6400, 800, 100, ... ?(1 point) Responses S8=8(1−(6400)18)1−6400 cap s sub 8 is equal to the fraction with numerator 8 times open paren 1 minus 6400 raised to the 1 eighth power close paren and denominator 1 minus 6400 S8=6400(1−(18)8)1−18 cap s sub 8 is equal to the fraction with numerator 6400 times open paren 1 minus 1 factorial times 8 factorial times 1 plus negative 8 factorial inverse raised to the 8 power close paren and denominator 1 minus 1 eighth S6400=8(1−(18)6400)1−18 cap s sub 6400 is equal to the fraction with numerator 8 times open paren 1 minus 1 eighth to the 6400th power close paren and denominator 1 minus 1 eighth S6400=6400(1−(8)8)1−8
S8=6400(1−(18)8)1−18
This is the correct formula to calculate the sum of the first eight terms of the sequence given.