A sequence/series problem: what's the sum of terms in the sequence?
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Answer:
{ E }
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{ E }
ted s
1st term = 1 = 2^0 2nd term = 2 = 2^1 3rd term = 4 = 2^2 4th term = 8 = 2^3 nth term = 2^(n-1) So, 16th term = 2^15 17th term = 2^16 18th term = 2^17 Sum of 16th, 17th and 18th term = 2^15 + 2^16 + 2^17 = 2^15 + (2^15 * 2) + (2^15 * 2 * 2) = 2^15 + 2(2^15) + 4(2^15) = 7(2^15)
Jinghui
1st term = 1 = 2^0 2nd term = 2 = 2^1 3rd term = 4 = 2^2 4th term = 8 = 2^3 nth term = 2^(n-1) So, 16th term = 2^15 17th term = 2^16 18th term = 2^17 Sum of 16th, 17th and 18th term = 2^15 + 2^16 + 2^17 = 2^15 + (2^15 * 2) + (2^15 * 2 * 2) = 2^15 + 2(2^15) + 4(2^15) = 7(2^15)
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