Pertanyaan

Uraian bentuk n = − 5 ∑ 4 8 ( − 2 ) n − 1 adalah ...

Uraian bentuk $n = - 5 \sum 4 8 (- 2)^{n - 1}$ adalah ...

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Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah E

Pembahasan

Jadi, jawaban yang tepat adalah E

$begin mathsize 12px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell sum from n equals negative 5 to 4 of 8 left parenthesis negative 2 right parenthesis to the power of n minus 1 end exponent end cell row blank equals cell 8 left parenthesis negative 2 right parenthesis to the power of negative 5 minus 1 end exponent plus 8 left parenthesis negative 2 right parenthesis to the power of negative 4 minus 1 end exponent plus 8 left parenthesis negative 2 right parenthesis to the power of negative 3 minus 1 end exponent plus space... space plus 8 left parenthesis negative 2 right parenthesis to the power of 4 minus 1 end exponent end cell row blank equals cell 8 left parenthesis negative 2 right parenthesis to the power of negative 6 end exponent plus 8 left parenthesis negative 2 right parenthesis to the power of negative 5 end exponent plus 8 left parenthesis negative 2 right parenthesis to the power of negative 4 end exponent plus space... space plus 8 left parenthesis negative 2 right parenthesis cubed end cell row blank equals cell 8 cross times 1 over 64 plus 8 cross times fraction numerator 1 over denominator negative 32 end fraction plus 8 cross times 1 over 16 plus... plus 8 cross times left parenthesis negative 8 right parenthesis end cell row blank equals cell 1 over 8 minus 1 fourth plus 1 half plus... negative 64 end cell end table end style$

Jadi, jawaban yang tepat adalah E