Question 130912
THE SUM OF AN INFINITE SERIERS IS:
S=A/(1-R) WHERE A=THE FIRST TERM & R=THE RATIO.
S=9/[1-(-1/3)]
S=9/(1+1/3)
S=9/(4/3)
S=9(3/4)
S=27/4
S=6.75 ANSWER.