Answer:
63/80
Step-by-step explanation:
Sn = a1(1-r^n)/1-r
S6 = 40(1-1/2^6)/1-1/2
S6 = 40(1-1/64)/1/2
S6 = 40(63/64)/1/2
S6 = 315/8/1/2
S6 = 63/80
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Answers & Comments
Answer:
63/80
Step-by-step explanation:
Sn = a1(1-r^n)/1-r
S6 = 40(1-1/2^6)/1-1/2
S6 = 40(1-1/64)/1/2
S6 = 40(63/64)/1/2
S6 = 315/8/1/2
S6 = 63/80