If S = 1 + a + a 2 +........ to then the value of a is

Mathematics · JEE Main · NTA Exams — Progression and Series

If S = 1 + a + a² +........ to then the value of a is

1. \(\frac{S}{S-1}\)
2. \(\frac{S}{1-S}\)
3. \(\frac{S-1}{S}\)
4. \(\frac{1-\mathrm{S}}{\mathrm{~S}}\)

Answer

(C) S-1 S

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