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9. Which of the following formulas is used to get the sum of an infinite geometric series?
21(1-1)
A.Sn = a-1 B. Sn =
C. Sn = (az + an) D.S = i​


Sagot :

Step-by-step explanation:

[tex] \colorbox{red}{A{ \colorbox{orange}{N{ \colorbox{yellow}{S{ \colorbox{blue}{W{ \colorbox{royalblue}{E{ \colorbox{cyan}{R{}}}}}}}}}}}}: [/tex]

9.a is the answe