Math, asked by win2427, 1 year ago

answer fast fast fast

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Answered by adee1729

0

5(1+11+111+........tn),

5/9[9+99+999+......tn],

5/9[(10-1)+(10²-1)+(10³-1)+.....tn],

so nth term will be 5/9[10^n-1]

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