## anonymous one year ago 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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1. Nnesha

do you know the formula to find sum of geometric ?

2. anonymous

No

3. anonymous

4. Nnesha

when common ration is less than one then lrl <1 you have to use this formula to $\frac{ a }{ 1-r }$

5. Nnesha

wehre a is first term r=1/2

6. Nnesha

substitute a and r for their values then solve