4(1+11+111+........upto n terms) Multiply and divide by 9 4/9 ( 9 + 99 + 999 .... n terms) 4/9 ( 10-1 + 10^2-1 + 10^3-1 .... n terms) 4/9 ( 10 + 10^2+ 10^3.... n terms) - (1+1+1... n term)

Suraj Lakhotia

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12-Jan-21 09:01