the first term of an infinite gp is 1 and every term is equals to the sum of the sucessive terms then its fourth term will be-
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As per the condition Sum of all terms following first term i.e. r+ r²+ r³+............ =1(First term)
→{r/(1−r)} =1
→ r=1−r
and 2r=2 i.e r= 1/2
Hence the series is 1, 1/2, 1/4, 1/8, 1/16...............
therefore the fourth term is 1/8.
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