What are the values of A sub 1 and r of the geometric series? 1 plus 3 plus 9 plus 27 plus 81
A
A sub 1 is equal to 1 and r is equal to 1 thirdB
A sub 1 is equal to 1 and r is equal to 3C
A sub 1 is equal to 3 and r is equal to 1D
A sub 1 is equal to 1 third and r is equal to 1