Геометрическая прогрессия . b1=8; q=2 ; s10-?

Question

Геометрическая прогрессия . b1=8; q=2 ; s10-?

Answer 1

B1=8,q=2,s10=?
sn=b1.(q ˇn-1)/(q-1)
s10=b1.(qˇ10-1)/(q-1)
s10=8.(2ˇ10-1)/(2-1)
s10=8.(1024-1)/1,s10=8.1023
s10=8184
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