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The sum of first 20 terms of the sequence 0.7, 0.77, 0.777, ..

Question

The sum of first 20 terms of the sequence 0.7, 0.77, 0.777, .. , is

\frac{7}{9} (99 - 10^{- 20})

\frac{7}{81} (179 + 10^{- 20})

\frac{7}{9} (99 + 10^{- 20})

(3)

\frac{7}{81} (179 - 10^{- 20})

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Question Text	The sum of first 20 terms of the sequence 0.7, 0.77, 0.777, .. , is
Answer Type	Video solution: 1
Upvotes	150