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