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Which answer represents the series in sigma notation?

1+1/3+1/9+1/27+1/81+1/243+1/729

 

  • ∑j=1713(j+1)

  • ∑j=173j−1

  • ∑j=1713j+1

  • ∑j=17(13)j−1

 

Which answer represents the series in sigma notation?

−3+(−1)+1+3+5

 

  • ∑j=15−3(13)j−1

  • ∑j=155j−1

  • ∑j=15(2j−5)

  • ∑j=15(3j−6)

Guest Apr 4, 2018
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Which answer represents the series in sigma notation?

 

1.
\(\begin{array}{|rcll|} \hline && 1+\dfrac{1}{3}+\dfrac{1}{9}+\dfrac{1}{27}+\dfrac{1}{81}+\dfrac{1}{243}+\dfrac{1}{729} \\ &=& \sum \limits_{j=1}^{15} \dfrac{1}{3^{j-1}} \\ \hline \end{array} \)

 

 

2.

\(\begin{array}{|rcll|} \hline && -3+(-1)+1+3+5 \\ &=& \sum \limits_{j=1}^{5} (2j-5) \\ \hline \end{array}\)

 

laugh

heureka  Apr 4, 2018

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