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find the sum of the series 1+(1+x)+(1+x+x^2)+....n terms , x≠1

Subham Chakrabertty , 7 Years ago
Grade 11
anser 1 Answers
ARKADEEP DAS

Last Activity: 7 Years ago

see subham it’s easy
the series = n+nx+nx^2.....+nx^n
now take n common 
then it is n(1+x+x^2+.......+x^n)
so a gp series
then sum = 1/1-x
answer  n/1-x

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