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OpenStudy (anonymous):
What is the sum of the first eight terms of a geometric series whose first term is 3 and whose common ratio is 1/2?
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Nnesha (nnesha):
do you know the formula to find sum of geometric ?
OpenStudy (anonymous):
No
OpenStudy (anonymous):
please help me
Nnesha (nnesha):
when common ration is less than one then lrl <1 you have to use this formula to \[\frac{ a }{ 1-r }\]
Nnesha (nnesha):
wehre a is first term r=1/2
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Nnesha (nnesha):
substitute a and r for their values then solve
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