How many terms of the geometric progression 1 + 4 + 16 + 64 + …….. must be added to get sum equal to 5461 ?
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Find the sum of G.P. :
0.3 + 0.03 + 0.003 + 0.0003 + …… to 8 terms.
A boy spends ₹ 10 on first day, ₹ 20 on second day, ₹ 40 on third day and so on. Find how much in all, will he spend in 12 days?