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Home  >>  JEEMAIN and AIPMT  >>  Mathematics  >>  Class11  >>  Sequence and Series
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Sum of 20 terms of the series 1+2+3+4+5+8+7+16+9+....... is


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Answer : (c) $\;98+2^{11}$
Explanation : every odd term is an AP of odd noumber and every even number is a GP of power of 2.
10 terms are AP of odd number and 10 terms are GP of common difference 2.
answered Jan 21, 2014 by yamini.v

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