SOLUTION: Find the sum to n terms of the G.P. 1+12+104+1006+....
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Algebra: Sequences of numbers, series and how to sum them
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Question 323108
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Find the sum to n terms of the G.P. 1+12+104+1006+....
Answer by
Jk22(389)
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=sum(10^k+2k,k=0,n-1)
=1/9*(10^n-1)+n(n-1)
