Question

How is the sum expressed in sigma notation?
13 + 21 + 29 + 37 + 45

Answer 1

`13~~ + ~~\stackrel{ 13+8 }{21~}~ + ~~\stackrel{ 21+8 }{29}~~ + ~~\stackrel{ 29+8 }{37}~~ + ~~\stackrel{ 37+8 }{45} \\\\[-0.35em] ~\dotfill\\\\ ~\hfill {\Large \begin{array}{llll} \displaystyle\sum_(i=0)^(4)~13+8i \end{array}}~\hfill`