Algebra · Classes 11, 12
Geometric Progression Sum
Sum of n geometric terms when r ≠ 1; for r=1, S=na.
FORMULA
\(S_n=a\frac{r^n-1}{r-1}\)
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Worked example
2+4+8+16 = 30
Understand this formula
Sum of n geometric terms when r ≠ 1; for r=1, S=na.
Check measurement units, mathematical domains and rounding before applying any result in an examination.